Safety Recall N222389310 Half-Shaft Disengagement – 2023 Cadillac XT6, GMC Acadia, Chevrolet Blazer, Traverse, & 2022-2023 Cadillac XT5

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GLOBAL SAFETY FIELD INVESTIGATIONS DCS6488 URGENT – DISTRIBUTE IMMEDIATELY Date: March 16, 2023 Subject: Upcoming Safety Recall N222389310 Half-Shaft Disengagement Models: 2022 – 2023 Cadillac XT5 2023 Cadillac XT6 2023 GMC Acadia 2023 Chevrolet Blazer 2023 Chevrolet Traverse To: All General Motors Dealers General Motors has notified the National Highway Traffic Safety Administration (NHTSA) about an upcoming safety recall that involves certain 2022 – 2023 model year Cadillac XT5, 2023 model year Cadillac XT6, 2023 model year GMC Acadia, 2023 model year Chevrolet Blazer, and 2023 model year Chevrolet Traverse vehicles. The GM recall number is N222389310. 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. General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2022 – 2023 model year Cadillac XT5, 2023 model year Cadillac XT6, 2023 model year GMC Acadia, 2023 model year Chevrolet Blazer, and 2023 model year Chevrolet Traverse vehicles. These vehicles may contain a dimensionally incorrect sun gear inside the transmission. This condition can cause the driver-side half-shaft to disengage from the transmission, causing a loss of propulsion and/or a loss of mechanical park. If the vehicle unexpectedly loses propulsion and/or mechanical park, there is increased risk of a crash or roll-away. GM is currently developing a remedy for this condition. 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, dealertraded, 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. Frequently 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. Until the recall bulletin is released, the Investigate Vehicle History (IVH) screen in the Global Warranty Management (GWM) system will display “03/16/2023” 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 to develop a remedy as quickly as possible. When a remedy is available and sufficient quantity of parts are 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-172 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : General Motors, LLC Submission Date : MAR 22, 2023 NHTSA Recall No. : 23V-172 Manufacturer Recall No. : N222389310 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 : 7,840 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2023-2023 Cadillac XT6 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 613 Cadillac XT6 vehicles affected by this recall. Production Dates : SEP 17, 2021 – DEC 12, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 GMC Acadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 1059 GMC Acadia vehicles affected by this recall. Production Dates : SEP 17, 2022 – DEC 12, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-172 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2023 Cadillac XT5 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 783 Cadillac XT5 vehicles affected by this recall. Production Dates : APR 01, 2022 – DEC 02, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2023-2023 Chevrolet Blazer Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 444 Chevrolet Blazer vehicles affected by this recall. Production Dates : SEP 22, 2022 – NOV 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2023-2023 Chevrolet Traverse Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with transmissions produced at GM’s Toledo manufacturing plant are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 4941 Chevrolet Traverse vehicles affected by this recall. Production Dates : SEP 19, 2022 – JAN 20, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-172 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2022 – 2023 model year Cadillac XT5, 2023 model year Cadillac XT6, 2023 model year GMC Acadia, 2023 model year Chevrolet Blazer, and 2023 model year Chevrolet Traverse vehicles. These vehicles may contain a dimensionally incorrect sun gear inside the transmission. This condition can cause the driver-side half-shaft to disengage from the transmission, causing a loss of propulsion and/or a loss of mechanical park. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the vehicle unexpectedly loses propulsion and/or mechanical park, there is increased risk of a crash or roll-away. Description of the Cause : Dimensionally incorrect sun gears were not identified and contained during the transmission manufacturing process. Identification of Any Warning that can Occur : Drivers may hear a grinding or clicking noise from the front of the vehicle. Involved Components : Component Name 1 : GEAR-FRT DIFF CARR SUN Component Description : Transmission Sun Gear Component Part Number : 24290255 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : On November 2, 2022, a GM brand quality manager submitted an issue to GM’s Speak Up for Safety (SUFS) program regarding a 2023 Chevrolet Blazer that experienced a loss of propulsion. On December 6, 2022, GM opened a product investigation. Part 573 Safety Recall Report 23V-172 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 GM’s investigation determined that, during a brief manufacturing period in August 2022, GM’s San Luis Potosi manufacturing plant may have not properly identified and contained dimensionally incorrect transmission sun gears. A review of field data identified 164 complaints potentially related to this condition, none of which involved a crash or injury. These complaints were received by GM between October 18, 2022 and January 17, 2023. On March 9, 2023, GM’s Safety and Field Action Decision Authority decided to conduct a safety recall. Description of Remedy : Description of Remedy Program : Dealers will replace transmission sun gear. 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 : Replacement sun gears are produced outside of the suspect window and are dimensionally correct. Identify How/When Recall Condition was Corrected in Production : Initial efforts at GM’s San Luis Potosi manufacturing plant implemented on September 21, 2022, provided partial containment of suspect gears. A new inspection process was fully implemented at San Luis Potosi on February 16, 2023. Recall Schedule : Description of Recall Schedule : Dealers will be notified on March 16, 2023. Owner notification is estimated to begin on May 1, 2023. Planned Dealer Notification Date : MAR 16, 2023 – MAR 16, 2023 Planned Owner Notification Date : MAY 01, 2023 – MAY 01, 2023 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-172 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : General Motors, LLC Submission Date : MAR 16, 2023 NHTSA Recall No. : 23V-172 Manufacturer Recall No. : N222389310 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 : 7,840 Estimated percentage with defect : 10 % Vehicle Information : Vehicle 1 : 2023-2023 Cadillac XT6 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 613 Cadillac XT6 vehicles affected by this recall. Production Dates : SEP 17, 2021 – DEC 12, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 GMC Acadia Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 1059 GMC Acadia vehicles affected by this recall. Production Dates : SEP 17, 2022 – DEC 12, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-172 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 3 : 2022-2023 Cadillac XT5 Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 783 Cadillac XT5 vehicles affected by this recall. Production Dates : APR 01, 2022 – DEC 02, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2023-2023 Chevrolet Blazer Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with the 2.0L 4-cylinder engine are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 444 Chevrolet Blazer vehicles affected by this recall. Production Dates : SEP 22, 2022 – NOV 24, 2022 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2023-2023 Chevrolet Traverse Vehicle Type : Body Style : Power Train : NR Descriptive Information : Manufacturing records and transmission trace data were used to identify potentially affected vehicles. Vehicles with transmissions produced at GM’s Toledo manufacturing plant are not affected by this recall. Vehicles with transmissions built outside the suspect window are not included in this recall. There are 4941 Chevrolet Traverse vehicles affected by this recall. Production Dates : SEP 19, 2022 – JAN 20, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-172 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Description of Defect : Description of the Defect : General Motors has decided that a defect which relates to motor vehicle safety exists in certain 2022 – 2023 model year Cadillac XT5, 2023 model year Cadillac XT6, 2023 model year GMC Acadia, 2023 model year Chevrolet Blazer, and 2023 model year Chevrolet Traverse vehicles. These vehicles may contain a dimensionally incorrect sun gear inside the transmission. This condition can cause the driver-side half-shaft to disengage from the transmission, causing a loss of propulsion and/or a loss of mechanical park. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : If the vehicle unexpectedly loses propulsion and/or mechanical park, there is increased risk of a crash or roll-away. Description of the Cause : Dimensionally incorrect sun gears were not identified and contained during the transmission manufacturing process. Identification of Any Warning that can Occur : Drivers may hear a grinding or clicking noise from the front of the vehicle. Involved Components : Component Name 1 : GEAR-FRT DIFF CARR SUN Component Description : Transmission Sun Gear Component Part Number : 24290255 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : On November 2, 2022, a GM brand quality manager submitted an issue to GM’s Speak Up for Safety (SUFS) program regarding a 2023 Chevrolet Blazer that experienced a loss of propulsion. On December 6, 2022, GM opened a product investigation. Part 573 Safety Recall Report 23V-172 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 GM’s investigation determined that, during a brief manufacturing period in August 2022, GM’s San Luis Potosi manufacturing plant may have not properly identified and contained dimensionally incorrect transmission sun gears. A review of field data identified 164 complaints potentially related to this condition, none of which involved a crash or injury. These complaints were received by GM between October 18, 2022 and January 17, 2023. On March 9, 2023, GM’s Safety and Field Action Decision Authority decided to conduct a safety recall. Description of Remedy : Description of Remedy Program : GM is currently developing a remedy for this condition. 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 : NR Identify How/When Recall Condition was Corrected in Production : Initial efforts at GM’s San Luis Potosi manufacturing plant implemented on September 21, 2022, provided partial containment of suspect gears. A new inspection process was fully implemented at San Luis Potosi on February 16, 2023. Recall Schedule : Description of Recall Schedule : Dealers will be notified on March 16, 2023. Owner notification is estimated to begin on May 1, 2023. Planned Dealer Notification Date : MAR 16, 2023 – MAR 16, 2023 Planned Owner Notification Date : MAY 01, 2023 – MAY 01, 2023 * NR – Not Reported

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GM CUSTOMER CARE AND AFTERSALES DCS6510 URGENT – DISTRIBUTE IMMEDIATELY Date: March 30, 2023 Subject: N222389310 – Safety Recall Half-Shaft Disengagement Application for Used Vehicle Working Capital Assistance Program (WCAP) Models: 2022 – 2023 Cadillac XT5 2023 Cadillac XT6 2023 GMC Acadia 2023 Chevrolet Blazer 2023 Chevrolet Traverse To: All General Motors Dealers On March 16, 2023, GM sent to all GM dealers GlobalConnect Message GCUS-3-2864 regarding safety recall N222389310. The required repair to complete this recall is not yet available. Until further instructions are received, the 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 cannot be delivered to customers, dealer-traded, released to auction, used for demonstration purposes or put to any other use. This message is to inform dealers who have involved vehicles in their inventory that they can now apply for the used vehicle Working Capital Assistance Program (“WCAP”) for safety recall N222389310. Before proceeding with the application process described below, dealers must verify vehicle eligibility based on the program terms and guidelines that were provided in GM GlobalConnect Message GCUS-9-14456 dated March 29, 2023. Applications submitted on ineligible vehicles are subject to chargeback of any incentives paid to the dealer under the WCAP. Because compensation and tracking requires visibility into dealers’ inventory, dealers must also have agreed to a Dealer Data Share agreement with GM in order to receive any compensation under this program. To apply for the WCAP for safety recall N222389310, dealers must access the GM Global Warranty Management (GWM) system and submit a “ZSET” warranty transaction using the labor code provided below for each eligible vehicle. This zero dollar special transaction type is the dealer’s application for compensation and constitutes a representation from the dealer that the vehicle is eligible for WCAP assistance. Note: Acceptance of the warranty transaction does not ensure vehicle eligibility or guarantee the provision of any assistance as defined by program terms and guidelines. Labor Code 9800104 Description Working Capital Assistance for Safety Recall N222389310 Labor Time N/A Trans Code ZSET To be eligible for the WCAP, a vehicle must be in dealer inventory at the time the related field action bulletin is released. If a vehicle has been delivered, wholesaled or otherwise disposed of prior to release of the bulletin, the vehicle is not eligible for assistance. Additionally, recalled vehicles taken in on trade may be eligible for assistance if the dealer immediately reports the vehicle in used vehicle inventory via its Dealer Management System (DMS) and makes application through the GWM system. To ensure that GM is receiving daily inventory information, which is necessary to process payments and make eligibility determinations under the WCAP, the dealer’s vehicles must be properly identified in the dealership’s DMS. A daily feed of this information is provided to GM through the Dealer Data Share (DDS) agreement. Beginning with the 1st quarter of 2019, all WCAP payments will be facilitated through the Global Warranty Management (GWM) system. For each eligible vehicle, a qualifying dealer will submit for WCAP vehicle enrollment with a “ZSET” transaction type and for reimbursement with a “ZFAT” transaction type both through the GWM system. If approved, a WCAP credit for that vehicle will be issued through the GWM system similar to any other warranty credit. WCAP submission instructions and the required labor code will also be provided in the appropriate field action bulletin. Each WCAP transaction being credited will be clearly identified on the dealer’s daily credit memo. In order to receive payment, a dealer must have timely reported the vehicle in used vehicle inventory, retained the vehicle until the related field action bulletin is released, and properly applied for the WCAP payment. The vehicle must also be otherwise eligible under WCAP rules and guidelines. GM reserves the right to amend, modify, terminate, or cancel this program at any time in its sole discretion. END OF MESSAGE GM CUSTOMER CARE AND AFTERSALES

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