N232396500 ABS Module Reprogramming – 2022 Chevrolet Low Cab Forward (LCF) 5500HD, 2022-2023 Chevrolet LCF 5500XD

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Document ID: 5032-5887 Repair Instructions Stereo Camera Programming The following procedure was intended to be performed indoors. If your circumstances do not allow you to program the Stereo Camera Programming indoors, an alternative, outdoor procedure is available. However, this indoor procedure is preferable. This procedure will instruct you how to program the ADAS Stereo Camera by establishing the centerline of the vehicle, determining the amount of offset of the Stereo Camera, properly positioning the Stereo Camera Target parallel to the front of the vehicle, and completing the procedure by entering three measurements taken during the procedure into IDSS. Carefully read the following procedure before performing it. Then, perform all the steps in order and exactly as written. Important: • The scan tool used for this procedure must be the same from start to finish. If the scan tool is changed midway, the procedure will fail. • Do NOT touch the camera lenses. • The vehicle should be unloaded (no cargo) and no one should be in the vehicle while performing this procedure. Use IDSS from outside the driver’s door. • Use masking tape on the floor to mark on to avoid permanently marking the floor. • Be sure the tires installed on the vehicle are all the same size and meet the original manufactured specification. Tire sizes other than the OEM specification may cause the ADAS system to not function properly. Do not program the ADAS Stereo Camera until the correct tires are installed on the vehicle. • Due to the time requirements of programming, it is recommended that an external power source be used to maintain system voltage. Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. To ensure trouble-free programming, it is recommended to use one of the following external power sources: o A Midtronic PCS charger o A fully charged 12V jumper or booster pack disconnected from the AC voltage supply Special Tools and Supplies • J-53207 Laser Measuring Tool • J-53325 Cross-line Laser Level • GE-53292 Plumb Bob/ Twisted Link Set (2 included) • GE-53206 Stereo Camera Target • GE-53291 Target Stand NOTE: All measurements taken and input in this procedure MUST be in metric units (e.g., millimeters). 1. Ensure the Vehicle is not loaded. Position the vehicle on a flat, even, hard, and level surface. Ensure that there is at least 8.0 Meters (26.5 feet) of flat, even, hard, and level surface directly in front of the vehicle. This area must be clear of all objects (shop equipment, poles, other vehicles, etc.) at least 2 meters (6.5 feet) from each side of the centerline of the front of the vehicle. (See Figure 1.) Ensure the parking brake is set. 2. Ensure that the windshield is clean, and the wheels are straight ahead. 3. Ensure that the tire size is correct for the vehicle and the tire pressure on all tires has been adjusted to proper specifications. KBTree Page 1 of 21 about:blank 1/19/2023 ESTABLISHING PIVOT POINTS 4. Locate the hole behind the steering gear on the Left-Front of the frame. (See Figures 2 and 3.) 5. Pass one of the Plumb Bob (Special Tool GE-53292) strings through the hole from the outside of the frame. 6. Pull the Plumb Bob string through until the point of the weight is barely above the floor. Tie off the string by looping it around the bolts as shown in Figure 4. KBTree Page 2 of 21 about:blank 1/19/2023 7. Locate the matching hole on the passenger side of the frame, which is behind the air conditioning condenser assembly. (See Figure 5 and 6.) KBTree Page 3 of 21 about:blank 1/19/2023 8. Pass the string of the other Plumb Bob (Special Tool GE-53292) through the hole from the outside of the frame. 9. Pull the Plumb Bob string through until the point of the weight is barely above the floor. Tie off the string by looping it around the bolts as shown in Figure 7. KBTree Page 4 of 21 about:blank 1/19/2023 10. Refer to Figure 8 for an illustration of both Plumb Bobs correctly in place. 11. Place masking tape underneath each Plumb Bob weight point. When each of the Plumb Bob weights is still, mark each piece of masking tape with an X directly under the points as shown in Figure 9. KBTree Page 5 of 21 about:blank 1/19/2023 12. When completed there should be 2 Xs under the vehicle as shown labeled A and B in Figure 10. 13. Remove both Plumb Bobs from the frame holes. PLUMB BOB STRING SET UP 14. If not already completed per the special tool instructions, make two overhand loops in one of the Plumb Bob strings as shown in Figure 11. The overall length from loop to loop when stretched taut should be approximately 54cm. KBTree Page 6 of 21 about:blank 1/19/2023 ESTABLISHING CENTERLINE OF VEHICLE Important: when performing Steps 15 – 20, it is critical that the looped string be held taut. Also, the exact position of the loops on the marker pen and the Plumb Bob point must be kept the same for each Step. Finally, both the Plumb Bob point and the marker pen should be kept completely straight up while performing each Step. NOTE: When performing Steps 15 – 20, refer to Figure 12. 15. Using the Plumb Bob weight point, hold one of the loops steadily on Point (A) made on the passenger’s side of the vehicle. Place the capped marker pen into the other loop and put the string taut. Pull the taut string towards to the rear-center of the vehicle to make an estimation of where the masking tape should be for marking the floor and put down a piece of masking tape. (See Figure 12.) 16. Perform Step 15 again, but with the marker pen uncapped, to create about a 3-inch arc on the masking tape at Point (C). (See Figure 13.) KBTree Page 7 of 21 about:blank 1/19/2023 17. Perform Steps 15 and 16 towards the front-center of the vehicle to create a marked arc on the floor at Point (D). (See Figure 12.) 18. Place the point of the Plumb Bob weight into one loop with the point lightly pressed down directly on the center of Point (B) made on the driver’s side of the vehicle. Place the capped marker pen into the other loop and pull the string taut. Pull the taut string towards to the rearcenter of the vehicle to determine if more masking tape is needed on the floor. Lay down more masking tape as necessary. (See Figure 12.) 19. Perform Step 18 again, but with the marker pen uncapped, to create about crossed arc at Point (C) on the floor. (See Figure 12.) 20. Perform Steps 18 and 19 towards the front-center of the vehicle to create a crossed arc at Point (D) on the floor. (See Figure 12.) 21. From about three feet in front of the vehicle use the Cross-Line Laser Level (Special Tool J-53325) to establish the centerline of the vehicle by placing the tool on the floor, turning it on, and aiming the beam directly through the intersection of both points C and D. (See Figure 14.) NOTE: Ensure that enough room is left from the front of the bumper to the Cross-Line Laser Level to allow for about a 12-inch strip of masking tape laid on the floor lengthwise with the vehicle. NOTE: When performing Steps 21 – 22, refer to Figure 14. 22. With the Cross-Line Laser Level still in place, put down a 12-inch piece of masking tape lengthwise under the laser beam directly in front KBTree Page 8 of 21 about:blank 1/19/2023 of the Cross-Line Laser Level. Trace the laser beam line onto the piece of masking tape with a marker pen. (See Figure 14.) This is the Center of the Vehicle reference mark. Establish Camera Offset NOTE: For Steps 23 – 29, refer to Figure 15 as a reference. 23. With the Cross-Line Laser Level still in place, lay an approximately 16” strip of masking tape horizontally on the windshield about 4 inches above the stereo camera. (See Figure 16.) 24. Use a piece of cardboard angled above the masking tape to reflect the laser beam as shown in Figure 17. Use the laser light to mark the center of the vehicle on the masking tape with two dots above each other. Use a ruler to connect the dots into a straight line with a ball point pen. (See Figure 18.) Label this line as the centerline of the truck (C.T.). KBTree Page 9 of 21 about:blank 1/19/2023 25. Use the mount for the Cross-Line Laser Level to attach it to the end of the Target Stand (Special Tool GE-53291) as shown in Figures 19 and 20. Which way the laser will have to be mounted depends on how high the Stereo Camera is mounted on the vehicle you are servicing. NOTE: Adjust the Cross-Line Laser Level height as close as possible to the center of the left (passenger) Stereo Camera lens. If the laser beams flash at any point during Steps 26 and 27, the Cross-Line Laser Level MUST be adjusted so that the angle and height of the horizontal laser beam is more level with the Stereo Camera lens. 26. Point the Cross-Line Laser Level at the passenger side Stereo Camera lens and adjust the Laser until the passenger side lens is bisected vertically and horizontally. (See Figure 21.) KBTree Page 10 of 21 about:blank 1/19/2023 27. Trace the vertical laser beam over the center of the passenger side lens onto the strip of masking tape over the camera with a ball point pen. (See Figure 15.) Mark this line as the center of the lens (C.L.). 28. Keeping the ruler or tape measure parallel with the floor, measure 80mm towards the driver’s side from the center of the lens line and make a dot with a ball point pen. This is the center of the camera. (See Figure 15.) Mark the dot center of camera (C.C.). 29. Measure the distance between the center of the truck (C.T.) and the center of the camera (C.C.) in millimeters and write it down for later use. This measurement is the camera offset of the vehicle. Establish Camera Height 30. Ensure that the Cross-Line Laser Level is still bisecting the passenger side Stereo Camera Lens as shown in Figure 21. Adjust the laser as necessary. 31. Place the end of a tape measure on the floor. Extend the tape measure straight upwards. Record where the horizontal laser beam crosses the tape measure (See Figure 22) and write it down for later use. This is the height of the camera. KBTree Page 11 of 21 about:blank 1/19/2023 Set Up Target 32. Remove the Cross-Line Laser Level from the Target Stand and the mount. Place the Cross-Line Laser Level on the floor and turn it on facing forward from the front of the vehicle. Align the laser beam with the Vehicle Centerline reference mark made on the floor in Step 22. (See Figure 23.) 33. If not already completed per the special tool instructions, attach the Stereo Camera Target (Special Tool GE-53206) to the Target Stand (Special Tool GE-53291). Refer to Figure 24 and adjust the height of the target so that both ends of the target position line are 1,000mm (1m) above the floor. KBTree Page 12 of 21 about:blank 1/19/2023 34. Tape the Plumb Bob string without the loops to the top of the Target Stand. The Plumb Bob string must pass directly through the center of the Target (over the small center mark) as shown in Figure 25. The Plumb Bob weight point should barely be off the floor. Establishing Target Distance for 4650mm (+/- 20mm) NOTE: Adjusting the Target distance should be done by two people. KBTree Page 13 of 21 about:blank 1/19/2023 35. Turn on the Laser Measuring Tool (Special Tool J-53207) and place it against the center of the vehicle’s front bumper cover facing forward. (See Figure 26.) 36. Using the Laser Measuring Tool, place the center of the Target 4,650 mm (+/- 20 mm) from the center of the front bumper cover. (See Figure 27.) 37. Adjust the Target until the Cross-Line Laser Level beam is directly over the Plumb Bob string and the small center mark shown in Figure 25. 38. Ensure that the middle of the target is still 4,650 mm (+/- 20 mm) from the vehicle’s front bumper cover. Adjust the target as necessary. Apply about a 2-foot length of masking tape to the floor centered under the Plumb Bob point, running lengthwise with the laser beam. Mark the masking tape with an X directly underneath the point of the Plumb Bob weight. (See Figure 28.) KBTree Page 14 of 21 about:blank 1/19/2023 39. Use a ruler or piece of cardboard tilted an angle to see the laser beam on the masking tape. (See Figure 29.) Establish two different points of the laser beam about 1 foot apart on the lengthwise masking tape with a dot from the marker pen. (See Figure 30.) Connect the two dots with a straight edge and mark a line. (See Figure 31.) Establishing Target Distance for 7650mm (+/- 20mm) NOTE: Adjusting the Target distance should be done by two people. 40. Using the Laser Measuring Tool, place the center of the Target 7,650 mm (+/- 20 mm) from the center of the front bumper cover. (See Figure 32.) KBTree Page 15 of 21 about:blank 1/19/2023 41. Adjust the Target until the Cross-Line Laser Level beam is directly over the Plumb Bob string and the small center mark shown in Figure 25. 42. Ensure that the middle of the target is still 7,650 mm (+/- 20 mm) from the vehicle’s front bumper cover. Adjust the target as necessary. Apply about a 2-foot length of masking tape to the floor centered under the Plumb Bob point, running lengthwise with the laser beam. Mark the masking tape with an X directly underneath the point of the Plumb Bob weight. (See Figure 33.) 43. Use a ruler or a piece of cardboard tilted an angle to see the laser beam on the masking tape. (See Figure 34.) Establish two different points of the laser beam about 1 foot apart on the lengthwise masking tape with a dot from the marker pen. (See Figure 35.) Connect the two dots with a straight edge and mark a line. (See Figure 36.) KBTree Page 16 of 21 about:blank 1/19/2023 44. Move aside the Target. 45. Use the ruler to mark a spot 6 inches in either direction from the center Plumb Bob X on the line made on the floor in Step 42. (See Figure 37.) Important: when performing Steps 46 – 48, it is critical that the looped string be held taut. Also, the exact position of the loops on the marker pen and the Plumb Bob point must be kept the same for each Step. Finally, both the Plumb Bob point and the marker pen should be kept completely straight up while performing each Step. NOTE: When performing Steps 46 – 48, refer to Figure 38. KBTree Page 17 of 21 about:blank 1/19/2023 46. Using the Plum Bob string with the loops, place the Plumb Bob weight point in one loop exactly in the center of Point (A). Put the capped marker pen in the other loop. Keep the string taut and move the pen to the left (the vehicle’s driver’s side). Apply a piece of masking tape on the floor where the arc at Point (C) will be made. (See Figure 38.) 47. Uncap the pen, keep the line taut and the Plumb Bob weight point in the other loop and create an arced line on the masking tape at Point (C). (See Figure 38.) 48. Use the process described in Steps 41 and 42 to create a crossed arc at Point (C) from Point (B). (See Figure 38.) 49. Perform Steps 45 through 48 on the 4,650mm (+/- 20mm) distance line created at Step 39. Square the Target to the Vehicle 50. Place the laser beam from the Cross-Line Laser Level through the exact center of the Plum Bob X and arc C. The laser beam line is exactly perpendicular (90°) to the centerline of the vehicle. (See Figure 38.) 51. Move the Target back in place at 4650mm (+/- 20mm). Align the Plumb Bob weight point with the X made in Step 38. Use the Laser Measuring Tool to ensure that the Target is 4,650 mm (+/- 20 mm) from the center of the vehicle’s front bumper cover. 52. Lift the Plumb Bob over the back of the Target and coil the string to keep the Plumb Bob Assembly from appearing anywhere in the Target as shown in Figure 39. KBTree Page 18 of 21 about:blank 1/19/2023 53. Move the Cross-Line Laser Level tool beam through the 90° marks from right to left as shown in Figure 40. Align the Target Stand with the laser beam as shown in Figure 42 and lock the casters of the Stand on that side. Move the Cross-Line Laser Level 180° (from left to right as shown in Figure 41.) Adjust the frame of the Target Stand as shown in Figure 43 and lock the casters on that side. KBTree Page 19 of 21 about:blank 1/19/2023 54. Connect IDSS to the vehicle and establish communications (key on, engine off). 55. Select Controller Programming. 56. Select ADAS Stereo Camera. (See Figure 44.) KBTree Page 20 of 21 about:blank 1/19/2023 57. Select Stereo Camera Setup. (See Figure 44.) 58. Follow the prompts and enter all the information/measurements established in previous steps. 59. After a successful learn procedure, IDSS will prompt you to move the target out to a distance of 7,650mm (+/- 20mm) for a camera inspection. Move the Target back in place at 7,650mm (+/- 20mm). Align the Plumb Bob weight point with the X made in Step 38. Use the Laser Measuring Tool to ensure that the Target is 7,650 mm (+/- 20 mm) from the center of the vehicle’s front bumper cover. 60. Follow Steps 50 through 52 to square the Target to the vehicle at 7,650mm (+/-20mm). 61. Lift the Plumb Bob over the back of the Target and coil the string to keep the Plumb Bob Assembly from appearing anywhere in the Target as shown in Figure 39. 62. Follow the prompt on IDSS to complete the camera inspection portion. 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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-017 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Isuzu Motors Limited Submission Date : JAN 23, 2023 NHTSA Recall No. : 23V-017 Manufacturer Recall No. : V2301 Manufacturer Information : Manufacturer Name : Isuzu Motors Limited Address : 46401 Commerce Center Drive Plymouth MI 48170-2473 Company phone : 866-441-9638 Population : Number of potentially involved : 242 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 ISUZU NQR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [8] Production Dates : NOV 04, 2021 – JUN 22, 2022 VIN Range 1 : Begin : JALE5W169N7901720 End : JALE5W164P7900686 ✔ Not sequential Vehicle 2 : 2022-2023 ISUZU NRR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [172] Production Dates : AUG 04, 2021 – JUL 12, 2022 VIN Range 1 : Begin : JALE5W163N7304806 End : JALE5W166P7304107 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2022 CHEVROLET LCF 5500HD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [2] Production Dates : SEP 13, 2021 – SEP 13, 2021 VIN Range 1 : Begin : JALEEW16XN7901449 End : JALEEW166N7901450 Not sequential Vehicle 4 : 2022-2023 CHEVROLET LCF 5500XD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [41] Production Dates : AUG 03, 2021 – JUN 17, 2022 VIN Range 1 : Begin : JALEEW165N7304774 End : JALEEW16XP7303185 ✔ Not sequential Vehicle 5 : 2023-2023 HINO S52 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [19] Production Dates : JUN 02, 2022 – JUL 21, 2022 VIN Range 1 : Begin : JALEMW16XP7302637 End : JALEMW16XP7304369 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : When the subject vehicles were modified to extend the frame to a 200 inch or 212 inch wheelbase, the ADAS camera and ABS module were not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve certain ADAS features and the ESC system working together with the ABS module may not function properly. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the ADAS camera and ABS module are not recalibrated after the frame is stretched, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Description of the Cause : The ADAS camera and ABS module were not recalibrated after the frame was stretched. Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : NR Component Description : NR Component Part Number : NR Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Part 573 Safety Recall Report 23V-017 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Chronology : Provided separately Description of Remedy : Description of Remedy Program : Isuzu dealers will recalibrate (1) the ADAS camera to account for the (extended) length of the vehicles, and (2) the ABS module so the ESC system will function properly with the affected vehicles’ longer wheelbases. All subject vehicles are covered under the New Truck Warranty. There is no expectation that these vehicles will need to be remedied outside of the warranty period. How Remedy Component Differs from Recalled Component : Physically there is no difference, this is a recalibration of the ABS module and ADAS camera. Identify How/When Recall Condition was Corrected in Production : On January 10, 2023, INAC QA travelled to the frame modification facilities that carry out the “factory option” frame extensions on behalf of Isuzu and trained the staff so all modified trucks produced after 1/10/2023 have the ADAS cameras and ESC systems properly calibrated. Recall Schedule : Description of Recall Schedule : Isuzu, Chevrolet, and Hino will notify their respective vehicle owners and dealers of this recall. Customers will be informed that the recall repairs will be done free of charge. The recall owner notification is expected to begin 3/10/2023. For additional information, Isuzu owners may contact Isuzu Customer Relations at 1-866-441-9638, Chevrolet owners may contact the GM Medium Duty Truck assistance line at 1-800-862-4389, and Hino owners may contact Hino Customer Service at 1-248-699-9390. Planned Dealer Notification Date : JAN 23, 2023 – JAN 23, 2023 Planned Owner Notification Date : MAR 10, 2023 – MAR 10, 2023 * NR – Not Reported

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Product Safety Recall N232396500 ABS Module Reprogramming Copyright 2023 General Motors. All Rights Reserved. Page 1 of 6 Release Date: January 2023 Revision: 00 Attention: It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification under a sale or lease until the defect or noncompliance is remedied. Vehicles involved in this recall were placed on stop delivery January 23, 2023. Once the service procedure contained in this bulletin has been performed on the vehicle, the vehicle is released from stop delivery and the vehicle can be delivered to the customer. All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes until the repair contained in this bulletin has been performed on the vehicle. ONLY Chevrolet Medium Duty dealers can complete this recall repair. Make Model Model Year RPO Description From To Chevrolet Low Cab Forward 5500HD/XD Medium Duty 2022 2023 EM2 ML5 200” Wheel Base 212” Wheel Base Involved vehicles are marked “Open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs. Condition Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022-2023 model year Chevrolet Low Cab Forward 5500HD/XD Medium Duty vehicles with 200 inch or 212 inch wheelbase. For these vehicles, the ADAS (Advanced Driver Assistance Systems) camera and ABS (Antilock Brake System) module were not calibrated according to the correct wheelbase. Therefore, when driving in a curve certain ADAS features and the ESC (Electronic Stability Control) system working together with the ABS module may not function properly. If the ADAS camera and ABS module are not calibrated to the correct wheelbase option, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Correction Dealers will recalibrate the ABS module so the ESC system will function properly with the affected vehicles’ wheelbases. Parts No parts are required for this repair. Warranty Information Labor Operation Description Labor Time Trans. Type Net Item 9106519* Verified Module Software or Calibration Level: Module Is Programmed with Same Level Software or Calibration 0.2 ZFAT N/A 9106520* Anti-Lock Brake Control Module Reprogramming with SPS 0.4** ZFAT N/A ** Includes 0.1 hours for administrative allowance. Important: * To avoid warranty transaction rejections, carefully read and follow the instructions below: Product Safety Recall N232396500 ABS Module Reprogramming Page 2 of 6 6125814 • The Warranty Claim Code from the programming event must be accurately entered in the “Warranty Claim Code” field of the transaction. • When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS2. Warranty Claim Code Information Retrieval 6125774 If the Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS2 system as follows: 1. Open TLC on the computer used to program the vehicle. 2. Select and start SPS2. 3. Select Settings (1). 4. Select the Warranty Claim Code tab (2). The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field. Service Procedure Note: Carefully read and follow the instructions below. • Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur. Product Safety Recall N232396500 ABS Module Reprogramming Page 3 of 6 • Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to www.gmdesolutions.com for further information. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger. • Follow the on-screen prompts regarding ignition power mode, but ensure that anything that drains excessive power (exterior lights, HVAC blower motor, etc) is off. • Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO. Important: The service technician always needs to verify that the VIN displayed in the TLC left side drop down menu and the top center window match the VIN plate of the vehicle to be programmed prior to using Service Programming System 2 (SPS2) for programming or reprogramming a module. • For the TLC application, service technicians need to always ensure that the power mode (ignition) is “ON” before reading the VIN from the vehicle’s VIN master module and that they do not select a VIN that is already in the TLC application memory from a previous vehicle. • If the VIN that shows up in the TLC top center window after correctly reading the VIN from the vehicle does not match the VIN plate of the vehicle, manually type in the VIN characters from the vehicle VIN plate into the TLC top center window and use these for programming or reprogramming the subject module with the correct vehicle VIN and software and/or calibrations. • The Engine Control Module (ECM) is the master module (for VIP vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the ECM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate. • The Body Control Module (BCM) is the master module (for GEM vehicles) that TLC reads to determine the VIN of the vehicle. If the VIN read from the vehicle by TLC does not match the VIN plate of the vehicle, the BCM also needs to be reprogrammed with the correct VIN, software and calibrations that match the vehicle’s VIN plate. Caution: Be sure the VIN selected in the drop-down menu (1) is the same as the vehicle connected (2) before beginning programming. 5743643 Important: If the vehicle VIN DOES NOT match, the message below will be shown. Product Safety Recall N232396500 ABS Module Reprogramming Page 4 of 6 5877000 5644477 Important: Techline Connect screens shown above. Important: If the same calibration/software warning is noted on the TLC Summary screen, select OK and follow screen instructions. After a successful programming event, the WCC is located in the Service Programming System dialogue box of the SPS Summary screen. No further action is required. Refer to the Warranty section of the bulletin. 1. Reprogram the anti-lock brake control module. Refer to Anti-Lock Brake Control Module: Programming and Setup in SI. 6256477 Important: During the Anti-Lock Brake Control Module Setup, IVH will need to be used to determine which wheelbase selection is needed – Either EM2 or EL5 (200” or 212” wheelbase). Product Safety Recall N232396500 ABS Module Reprogramming Page 5 of 6 1.1. On the Select Controller screen, select “Anti-Lock Brake Control Module” and select “Setup” for “Select Function Sequence” in Techline connect and follow on screen instructions. 5644478 Note: The screenshot above is an example of module programming and may not be indicative of the specific module that is being programmed. Module selection and VIN information have been blacked out. Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the screen. 2. Record SPS Warranty Claim Code on job card for warranty transaction submission. Dealer Responsibility – For USA & Export (USA States, Territories, and Possessions) It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification under a sale or lease until the defect or noncompliance is remedied. The US National Traffic and Motor Vehicle Safety Act provides that each vehicle that is subject to a recall of this type must be adequately repaired within a reasonable time after the customer has tendered it for repair. A failure to repair within sixty days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time. If the condition is not adequately repaired within a reasonable time, the customer may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation. To avoid having to provide these burdensome remedies, every effort must be made to promptly schedule an appointment with each customer and to repair their vehicle as soon as possible. In the recall notification letters, customers are told how to contact the US National Highway Traffic Safety Administration if the recall is not completed within a reasonable time. Dealer Responsibility – All All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers’ possession and subject to this recall must be held and inspected/repaired per the service procedure of this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration, or any other purpose. All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System (CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within the CPOIS system, or once again be used in the CTP program. Dealers are to service all vehicles subject to this recall at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward. Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. Recall follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter. In summary, whenever a vehicle subject to this field action enters your vehicle inventory you must take the steps necessary to ensure the program correction has been made before selling the vehicle. In addition, for vehicles entering Product Safety Recall N232396500 ABS Module Reprogramming Page 6 of 6 your facility for service, you are required to ensure the customer is aware of the open field action and make every reasonable effort to implement the program correction as set forth in this bulletin prior to releasing the vehicle. Dealer Reports – For USA & Export For dealers with involved vehicles, a listing has been prepared and will be available through GM GlobalConnect Maxis Field Action Reports or sent directly to export dealers. The Inventory tab of the dealer reports will contain VINs that apply to this recall. This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer In-Service tab will contain customer names and addresses from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall may be a violation of law in several states. Customer Notification USA & Canada – General Motors will notify customers of this recall on their vehicle. GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the tools, equipment, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your dealer for information on whether your vehicle may benefit from the information. We Support Voluntary Technician Certification

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GLOBAL SAFETY FIELD INVESTIGATIONS DCS6418 URGENT – DISTRIBUTE IMMEDIATELY Date: January 23, 2023 Subject: Stop Delivery Order for Upcoming Safety Recall N232396500 ABS Module and Frontview Camera Module Reprogramming Models: 2022-2023 Chevrolet Low Cab Forward 5500HD/XD Medium Duty Equipped with 200” or 212” Wheel Base (RPO EM2 or EL5) and optional ADAS System (RPO PCJ) To: All General Motors Medium Duty Dealers STOP DELIVERY ORDER Effective immediately, stop the delivery of certain 2022-2023 model year Chevrolet Low Cab Forward 5500HD/XD Medium Duty vehicles in new or used vehicle inventory. Isuzu Motors Limited, the manufacturer of these vehicles, has notified the National Highway Traffic Safety Administration (NHTSA) about an upcoming safety recall that involves these vehicles. The GM recall number is N232396500. It is a violation of federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification until the defect is remedied. Isuzu Motors Limited has decided that a defect, which relates to motor vehicle safety, exists in certain 2022-2023 model year Chevrolet Low Cab Forward 5500HD/XD Medium Duty vehicles with 200 inch or 212 inch wheelbase. For these vehicles, the ADAS (Advanced Driver Assistance Systems) camera and ABS (Antilock Brake System) module were not calibrated according to the correct wheelbase. Therefore, when driving in a curve certain ADAS features and the ESC (Electronic Stability Control) system working together with the ABS module may not function properly. If the ADAS camera and ABS module are not calibrated to the correct wheelbase option, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Dealers will recalibrate (1) the ADAS camera to the correct wheelbase of the vehicles, and (2) the ABS module so the ESC system will function properly with the affected vehicles’ wheelbases. Until further instructions are received, involved vehicles that are in dealers’ possession (new or used vehicle inventory, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc.) must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration purposes or any other dealer use. All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System (CPOIS) will be de-certified. The Investigate Vehicle History (IVH) screen in the Global Warranty Management (GWM) system has been updated for this upcoming recall. This action has been taken to assist dealers with determining which vehicles are involved so they can properly respond to customer inquiries. A list of involved vehicles that have been identified as being in dealer new vehicle inventory is attached to this message. It is sorted by dealer Business Associate Code (BAC) for easy reference. Your dealership’s BAC will not be listed if none of the involved vehicles are currently in your new vehicle inventory. To identify involved vehicles in dealer used inventory, run an Open VIN Report or Field Action Initiation Report using Field Action Reports-GFAM within the Maxis Dealer Application in GlobalConnect. Question and Answer Document (Q&A) Attached to this message you will find a document that addresses the ten most likely questions customers may have regarding this Safety Recall. Please use this information as an aid to confidently answer customer concerns. Until the recall bulletin is released, the Investigate Vehicle History (IVH) screen in the Global Warranty Management (GWM) system will display “01/23/2023” under Release Date and “Incomplete – Remedy Not Available” under Status. This means the required repair is not yet available and dealers should not attempt to perform any repairs. We are working with the supplier to obtain the required parts as quickly as possible. When a sufficient quantity of parts is available, the recall bulletin will be released, and dealers can begin repairing vehicles. END OF MESSAGE GLOBAL SAFETY FIELD INVESTIGATIONS

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-017 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Isuzu Motors Limited Submission Date : FEB 01, 2023 NHTSA Recall No. : 23V-017 Manufacturer Recall No. : V2301 Manufacturer Information : Manufacturer Name : Isuzu Motors Limited Address : 46401 Commerce Center Drive Plymouth MI 48170-2473 Company phone : 866-441-9638 Population : Number of potentially involved : 242 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 ISUZU NQR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [8] Production Dates : NOV 04, 2021 – JUN 22, 2022 VIN Range 1 : Begin : JALE5W169N7901720 End : JALE5W164P7900686 ✔ Not sequential Vehicle 2 : 2022-2023 ISUZU NRR Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [172] Production Dates : AUG 04, 2021 – JUL 12, 2022 VIN Range 1 : Begin : JALE5W163N7304806 End : JALE5W166P7304107 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2022 CHEVROLET LCF 5500HD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [2] Production Dates : SEP 13, 2021 – SEP 13, 2021 VIN Range 1 : Begin : JALEEW16XN7901449 End : JALEEW166N7901450 Not sequential Vehicle 4 : 2022-2023 CHEVROLET LCF 5500XD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to interim MY 2022 and MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [41] Production Dates : AUG 03, 2021 – JUN 17, 2022 VIN Range 1 : Begin : JALEEW165N7304774 End : JALEEW16XP7303185 ✔ Not sequential Vehicle 5 : 2023-2023 HINO S52 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL Descriptive Information : This recall applies to MY 2023 Class 5 diesel vehicles equipped with ESC, or ESC and optional ADAS, that have the factory frame modification option to extend the wheelbase from 176 inches to 200 or 212 inches. Recall population is based on factory frame modification option code upon purchase of the vehicle. [19] Production Dates : JUN 02, 2022 – JUL 21, 2022 VIN Range 1 : Begin : JALEMW16XP7302637 End : JALEMW16XP7304369 ✔ Not sequential Part 573 Safety Recall Report 23V-017 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : When the subject vehicles were modified to extend the frame to a 200 inch or 212 inch wheelbase, the ADAS camera and ABS module were not recalibrated to account for the different inputs from the vehicle resulting from the stretched frame. Therefore, when driving in a curve certain ADAS features and the ESC system working together with the ABS module may not function properly. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the ADAS camera and ABS module are not recalibrated after the frame is stretched, one or more of the following events could occur – in each case, increasing the risk of a crash: • Automatic Emergency Braking System (AEBS) activation (as well as the AEBS warning light) may be delayed when driving in a curve and therefore the AEBS may then decelerate the vehicle more aggressively when activated. • Adaptive Cruise Control may reduce following distance by about 8-10 m when driving in a curve. • ESC may activate in an understeer condition without illuminating brake lights. • ESC may delay activation in an oversteer condition, increasing potential for an oversteer event to occur. Description of the Cause : The ADAS camera and ABS module were not recalibrated after the frame was stretched. Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : Electronic Hydraulic Control Unit (EHCU) Component Description : Base component for controlling the hydraulic service brakes. Anti-lock Brake System, Electronic Stability Control, Automatic Emergency Braking. Component Part Number : 8976513901, 8978299390 Component Name 2 : ADAS Stereo Camera Component Description : Base component for early driver warning Advanced Driver Assistance System and Forward Collision Avoidance Component Part Number : 8979014302, 8979038031 Part 573 Safety Recall Report 23V-017 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : Provided separately Description of Remedy : Description of Remedy Program : Isuzu dealers will recalibrate (1) the ADAS camera to account for the (extended) length of the vehicles, and (2) the ABS module so the ESC system will function properly with the affected vehicles’ longer wheelbases. All subject vehicles are covered under the New Truck Warranty. There is no expectation that these vehicles will need to be remedied outside of the warranty period. How Remedy Component Differs from Recalled Component : Physically there is no difference, this is a recalibration of the ABS module and ADAS camera. Identify How/When Recall Condition was Corrected in Production : On January 10, 2023, INAC QA travelled to the frame modification facilities that carry out the “factory option” frame extensions on behalf of Isuzu and trained the staff so all modified trucks produced after 1/10/2023 have the ADAS cameras and ESC systems properly calibrated. Recall Schedule : Description of Recall Schedule : Isuzu, Chevrolet, and Hino will notify their respective vehicle owners and dealers of this recall. Customers will be informed that the recall repairs will be done free of charge. The recall owner notification is expected to begin 3/10/2023. For additional information, Isuzu owners may contact Isuzu Customer Relations at 1-866-441-9638, Chevrolet owners may contact the GM Medium Duty Truck assistance line at 1-800-862-4389, and Hino owners may contact Hino Customer Service at 1-248-699-9390. Planned Dealer Notification Date : JAN 23, 2023 – JAN 23, 2023 Planned Owner Notification Date : MAR 10, 2023 – MAR 10, 2023 * NR – Not Reported

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GLOBAL SAFETY FIELD INVESTIGATIONS DCS6426 URGENT – DISTRIBUTE IMMEDIATELY Date: January 31, 2023 Subject: N232396500 – Safety Recall ABS Module Reprogramming Models: 2022-2023 Chevrolet Low Cab Forward 5500HD/XD Medium Duty Equipped with 200” Wheel Base or 212” Wheel Base (RPO EM2 or ML5) To: All General Motors Medium Duty Dealers General Motors is releasing Safety Recall N232396500 today. The total number of U.S. vehicles involved is 41. Please see the attached bulletin for details. Vehicles involved in this recall were placed on stop delivery January 23, 2023. Once the service procedure contained in the bulletin has been performed on the vehicle, the vehicle is released from stop delivery and the vehicle can be delivered to the customer. Frequenty Asked Questions Document (FAQs) Attached to this message you will find a document that addresses the ten most likely questions customers may have regarding this Safety Recall. Please use this information as an aid to confidently answer customer concerns. Customer Letter Mailing The customer letter mailing will begin in the near future. Global Warranty Management (GWM) The Required Field Action section on the Investigate Vehicle History (IVH) screen will be updated January 31, 2023. A list of vehicles in dealer inventory is attached to this message. Please hold all warranty transactions until IVH has been updated. END OF MESSAGE GLOBAL SAFETY FIELD INVESTIGATIONS

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