N232407300 Open Ground May Not Be Detected – Webasto Portable Charging Cords (Gen 3)

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Safety Recall N232407300 Open Ground May Not Be Detected Copyright 2023 General Motors. All Rights Reserved. Page 1 of 6 Release Date: August 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. This bulletin contains an inspection procedure until remedy parts become available. It is estimated that a very small percentage of the involved vehicles will fail the inspection and require part replacement. Vehicles that are in Dealer Inventory that Do Not Pass the inspection procedure MUST be held and NOT SOLD or Delivered until remedy parts are available (use “Inspection Only – Vehicle Did Not Pass Inspection and Will Require Repair – claim submission will not close field action” labor code 9106966. Floor plan/WCAP reimbursement will also be added in a future revision for vehicles which did not pass the inspection procedure. Vehicles that pass this inspection procedure should be closed using the “Inspect Only – Vehicle Passed Inspection (No Further Action Required)” labor code 9106965. All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes unless the vehicle has passed the inspection procedure contained in this bulletin. The entire vehicle must be held, not just the associated charging cord. This field action must only be completed by Chevrolet EV certified dealers who have met all Bolt field action-specific training, tool and equipment requirements, and repairs must be performed by a technician who has successfully completed the required training. For Canadian Dealers: Only Chevrolet Dealers who have signed the Chevrolet Electric Models Agreement and have met all the Chevrolet Bolt EUV-specific training, tools, and equipment requirements are eligible to complete the repair. Any Dealer unsure of their eligibility status should immediately review with their District Service Manager. Make Model Model Year RPO Description From To Chevrolet Bolt EUV 2022 2023 Involved vehicles are marked “Incomplete – Remedy Not Available” 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 General Motors has decided that a defect which relates to motor vehicle safety may exist in certain Webasto high-voltage portable charging cords provided with certain 2022 – 2023 model year Chevrolet Bolt EUV vehicles. These charging cords contain incorrect software and may fail to discontinue charging if the ground connection is lost. Someone charging the vehicle with the portable charging cord may be exposed to an unprotected high voltage if the cordset loses its ground connection while in use, increasing the risk of a very brief electrical shock. Correction Dealers will inspect the portable charging cord and replace if necessary. Parts It is estimated that a very small percentage of the involved vehicles will fail the inspection and require part replacement. For those vehicles that do not pass the inspection, the bulletin will be updated when the remedy and required parts become available, at which time those vehicles can be repaired. No parts are required for this inspection procedure. Warranty Information Labor Operation Description Labor Time Trans. Type Net Item 9106965 Inspection Only – Vehicle Passed Inspection (No Further Action Required) 0.2 ZFAT N/A 9106966 Inspection Only – Vehicle Did Not Pass Inspection and Will Require Repair – claim submission will not close field action 0.2 ZFAT N/A Important: Please select the appropriate labor code when submitting the claim. 9106965 should only be used if the vehicle PASSED the inspection. Note: When parts become available and the revised bulletin is released, Floor Plan/WCAP Reimbursement will be included for vehicles which did not pass the inspection procedure. Safety Recall N232407300 Open Ground May Not Be Detected Page 2 of 6 Service Procedure 6419500 Note: Ensure the Charging Cord being inspected is the one that came with the vehicle, NOT an aftermarket Charging Cord. 1. Locate the Charging Cord (1), shown above. 6419503 Note: Press the “ctrl” and “F” keys on your keyboard at the same time to open a search box for this document. Enter the full serial number into this search box to quickly see if it is included in the table below or not. Note: You MUST enter the full 16 digit serial number in this search box. 2. On the back side of the Charging Cord (1), locate the serial number (2) and compare it to the table below. • If the serial number is NOT on the table below, no further action is required. • If the serial number IS on the table below, proceed to step 3. Safety Recall N232407300 Open Ground May Not Be Detected Page 3 of 6 6420700 Danger: The Charging Cord MUST be disconnected and deenergized before it can be cut to prevent potential bodily harm. Warning: When working with any type of cutting equipment and or the exposed metal on the inside of the Charging Cord, wear approved safety glasses and gloves in order to reduce the chance of personal injury. 3. Cut the cord (2) connecting the Vehicle Connector (1) to the main module (3) so that the Charging Cord is no longer usable. 4. Wrap the cut ends of the cord in electrical tape. Note: The Charging Cord MUST be retained as the serial number will be required when submitting the revised bulletin’s closing labor op. The bulletin will be updated when the remedy and required parts become available. 5. Place the Charging Cord back into the vehicle. 6. Hold THE ENTIRE VEHICLE until remedy parts become available. 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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 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. Safety Recall N232407300 Open Ground May Not Be Detected Page 6 of 6 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. Courtesy Transportation – For USA & Canada Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the warranty coverage period. See General Motors Service Policies and Procedures Manual for courtesy transportation program details. Customer Notification USA & Canada – General Motors will notify customers of this recall on their vehicle. Export – Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor Vehicle Safety Act. 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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Reference Number: GCUS-3-3018 N232407300 – Safety Recall – Open Ground May Not Be Detected GLOBAL SAFETY FIELD INVESTIGATIONS DCS6663 URGENT – DISTRIBUTE IMMEDIATELY Date: August 31, 2023 Subject: N232407300 – Safety Recall Open Ground May Not Be Detected Models: 2022 – 2023 Chevrolet Bolt EUV To: All General Motors Dealers General Motors is releasing Safety Recall N232407300 today with an interim inspection. The total number of U.S. vehicles involved is approximately 9,423. Please see the attached bulletin for details. The parts needed to complete the required repair are not yet available. All VINs will be placed in Incomplete Remedy Not Available status. This bulletin contains an inspection procedure until remedy parts become available. It is estimated that a very small percentage of the involved vehicles will fail the inspection and require part replacement. Vehicles that are in Dealer Inventory that Do Not Pass the inspection procedure MUST be held and NOT SOLD or Delivered until remedy parts are available (use “Inspection Only – Vehicle Did Not Pass Inspection and Will Require Repair – claim submission will not close field action” labor code 9106966. Floor plan/WCAP reimbursement will also be added in a future revision for vehicles which did not pass the inspection procedure. Vehicles that pass this inspection procedure should be closed using the “Inspect Only – Vehicle Passed Inspection (No Further Action Required)” labor code 9106965. Frequently Asked Questions Document (FAQs) Attached to this message you will find a document that addresses the most likely questions customers may have regarding this Safety Recall. Please use this information as an aid to confidently answer customer concerns. Global Warranty Management (GWM) The Required Field Action section on the Investigate Vehicle History (IVH) screen will be updated August 31, 2023. A list of vehicles in dealer inventory is attached to this message. END OF MESSAGE GLOBAL SAFETY FIELD INVESTIGATIONS

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23E-065 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : General Motors, LLC Submission Date : AUG 31, 2023 NHTSA Recall No. : 23E-065 Manufacturer Recall No. : N232407300 Manufacturer Information : Manufacturer Name : General Motors, LLC Address : 29427 Louis Chevrolet Road MAIL CODE 480-210-2V WARREN MI 48093 Company phone : 586-596-1733 Population : Number of potentially involved : 9,423 Estimated percentage with defect : 3 % Equipment Information : Brand / Trade 1 : Webasto Model : Portable Charging Cordset (Gen 3) Part No. : 24044913 Size : NR Function : NR Descriptive Information : Suspect part serial numbers and GM manufacturing records were used to identify the population. Vehicles manufactured outside of GM’s potentially affected production period are not included in this recall. Only certain Chevrolet Bolt EUV models are affected by this recall. Production Dates : MAY 14, 2022 – MAY 16, 2022 Description of Defect : Description of the Defect : General Motors has decided that a defect which relates to motor vehicle safety may exist in certain Webasto high-voltage portable charging cords provided with certain 2022 – 2023 model year Chevrolet Bolt EUV vehicles. These charging cords contain incorrect software and may fail to discontinue charging if the ground connection is lost. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Someone charging the vehicle with the portable charging cord may be exposed to an unprotected high voltage if the cordset loses its ground connection while in use, increasing the risk of a very brief electrical shock. Part 573 Safety Recall Report 23E-065 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Cause : The supplier built these cord assemblies with software that is not properly calibrated to the hardware version. Identification of Any Warning that can Occur : NR Involved Components : Component Name : MODULE ASM-DRV MOT BATT CHARGER Component Description : Portable Charging Cordset Component Part Number : 24044913 Supplier Identification : Component Manufacturer Name : Webasto Charging Systems, Inc. Address : 1333 S Mayflower Ave Unit 100 Monrovia California 91016 Country : United States Chronology : On March 8, 2023, during a supplier plant audit, GM’s quality engineer discovered an incorrect hardware / software combination being used to produce portable charging cords for the Chevrolet Bolt EUV. Following a review of the issue on April 18, 2023, the issue was reported to GM’s Speak Up For Safety (SUFS) program. GM opened a product investigation on May 9, 2023. GM’s investigation determined that the mismatch between software and hardware in the suspect charging cords may, under certain circumstances, not allow the software to sufficiently interpret information from monitored circuitry. This could result in failure of the cord assembly’s internal processor to properly detect a ground loss and, in response, fail to halt further charging quickly enough to prevent shock. Testing conducted between August 10 and August 18, 2023, concluded that under certain ground loss conditions, at high ambient temperatures, these units may not correctly interrupt charging. In such limited circumstances, a user could experience a small electric shock for 1/40th of a second. GM’s investigator obtained 374 specific serial numbers for affected parts from GM’s supplier and traced these to GM’s production period when vehicles may have been shipped with suspect parts. GM produced 10,825 potentially affected vehicles during this period of which 9,423 are in the US. GM is not aware of any field incidents related to this condition. Part 573 Safety Recall Report 23E-065 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 On August 24, 2023, GM’s Safety and Field Action Decision Authority decided to conduct an equipment safety recall. Description of Remedy : Description of Remedy Program : Dealers will inspect the portable charging cord and replace if necessary. Pursuant to 49 C.F.R. § 573.13(d)(1), all covered vehicles are under warranty, so reimbursement is not offered. How Remedy Component Differs from Recalled Component : The remedy component was produced with a compatible software / hardware combination. Identify How/When Recall Condition was Corrected in Production : Vehicles built after September 22, 2022 were provided portable charging cords with updated software, compatible with the hardware. Recall Schedule : Description of Recall Schedule : Dealers will be notified on August 31, 2023. Owner notification is estimated to begin on October 16, 2023. Planned Dealer Notification Date : AUG 31, 2023 – AUG 31, 2023 Planned Owner Notification Date : OCT 16, 2023 – OCT 16, 2023 Purchaser Information : The following manufacturers purchased this defective/noncompliant equipment for possible use or installation in new motor vehicles or new items of motor vehicle equipment: Name : NR Address : NR NR Country : NR Company Phone : NR * NR – Not Reported

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