# Service bulletin 22\-NA\-115 A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned. - Type: Service bulletin - NHTSA id: 10231893 - Published by NHTSA: 2023\-02\-21 - Manufacturer's number: 22\-NA\-115 - Manufacturer's date: 2023\-02\-01 - NHTSA component: ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING ## NHTSA's summary This service bulletin provides information for U.S. dealers ONLY to refer to the Battery Maintenance Report to identify vehicles in dealer inventory that require attention. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231893-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231893-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system, Engine ## Vehicles listed - 2020 to 2023 BUICK ENCLAVE - 2020 to 2022 BUICK ENCORE - 2023 BUICK ENCORE - 2020 to 2023 BUICK ENCORE GX - 2020 to 2023 BUICK ENVISION - 2020 BUICK LACROSSE - 2020 BUICK REGAL - 2020 to 2023 CADILLAC CT4 - 2020 to 2023 CADILLAC CT5 - 2020 CADILLAC CT6 - 2021 CADILLAC CT6 - 2020 to 2023 CADILLAC ESCALADE - 2020 to 2023 CADILLAC ESCALADE ESV - 2021 CADILLAC ESCALADE NA - 2023 CADILLAC LYRIQ - 2020 to 2023 CADILLAC XT4 - 2020 to 2023 CADILLAC XT5 - 2020 to 2023 CADILLAC XT6 - 2020 CADILLAC XTS - 2023 CADILLAC redundant LYRIQ - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2020 CHEVROLET 4500 - 2022 CHEVROLET 4500 - 2020 to 2022 CHEVROLET 4500HD - 2020 to 2022 CHEVROLET 4500XD - 2020 to 2022 CHEVROLET 5500HD - 2020 to 2022 CHEVROLET 5500XD - 2019 CHEVROLET 6500 - 2022 CHEVROLET 6500HD - 2020 to 2023 CHEVROLET BLAZER - 2022 to 2023 CHEVROLET BOLT EUV - 2020 to 2023 CHEVROLET BOLT EV - 2020 to 2023 CHEVROLET CAMARO - 2020 to 2023 CHEVROLET COLORADO - 2020 to 2023 CHEVROLET CORVETTE - 2020 to 2023 CHEVROLET EQUINOX - 2020 to 2021 CHEVROLET EXPRESS - 2023 CHEVROLET EXPRESS 2500 - 2023 CHEVROLET EXPRESS 3500 - 2020 CHEVROLET IMPALA - 2020 to 2023 CHEVROLET MALIBU - 2021 CHEVROLET ONIX - 2020 to 2023 CHEVROLET SILVERADO 1500 - 2020 to 2023 CHEVROLET SILVERADO 2500 - 2020 to 2023 CHEVROLET SILVERADO 3500 - 2020 to 2023 CHEVROLET SILVERADO 4500 - 2019 to 2021 CHEVROLET SILVERADO 5500 - 2023 CHEVROLET SILVERADO 5500 - 2021 to 2023 CHEVROLET SILVERADO 6500 - 2020 CHEVROLET SONIC - 2020 to 2022 CHEVROLET SPARK - 2020 to 2023 CHEVROLET SUBURBAN - 2021 to 2022 CHEVROLET SUBURBAN 1500 - 2020 to 2023 CHEVROLET TAHOE - 2020 CHEVROLET TRAILBLAZER - 2021 to 2023 CHEVROLET TRAILBLAZER - 2020 to 2023 CHEVROLET TRAVERSE - 2020 to 2022 CHEVROLET TRAX - 2020 to 2023 GMC ACADIA - 2020 to 2023 GMC CANYON - 2022 to 2023 GMC HUMMER EV PICKUP - 2020 to 2023 GMC SAVANA - 2020 to 2023 GMC SIERRA 1500 - 2020 to 2023 GMC SIERRA 2500 - 2020 to 2023 GMC SIERRA 3500 - 2020 GMC SIERRA DENALI - 2020 to 2023 GMC TERRAIN - 2022 GMC TERRAIN NA - 2020 to 2023 GMC YUKON - 2020 to 2023 GMC YUKON XL ## Recalls for the same vehicles and component - [2025225](/recalls/tc/2025225.md), 2025-04-24: Engine - [25V274000](/recalls/nhtsa/25V274000.md), 2025-04-24: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL - [24V133000](/recalls/nhtsa/24V133000.md), 2024-02-22: ELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:CAMERA/SENSOR; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING - [2023210](/recalls/tc/2023210.md), 2023-04-06: Electrical - [23V247000](/recalls/nhtsa/23V247000.md), 2023-04-06: ELECTRICAL SYSTEM:WIRING - [21V421000](/recalls/nhtsa/21V421000.md), 2021-06-10: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE - [2021166](/recalls/tc/2021166.md), 2021-03-18: Electrical - [21V189000](/recalls/nhtsa/21V189000.md), 2021-03-18: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES - [20V790000](/recalls/nhtsa/20V790000.md), 2020-12-17: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL - [20V489000](/recalls/nhtsa/20V489000.md), 2020-08-18: ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE:BODY:TRUNK LID ## Other bulletins for the same vehicles and component - [N242484750\-02](/bulletins/11036594.md), 2026-09-01, Warranty extension: ENGINE. Special Coverage. Certain 2022 model year Buick Encore GX and Chevrolet Trailblazer vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger to fail. If this condition occurs, the Malfunction Indicator Lamp \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Additionally, a message may be displayed indicating the vehicle’s available engine power is reduced. This special coverage covers the condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after January 14, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to January 14, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the turbocharger as necessary. The repairs will be made at no charge to the customer. - [N262546590\-01](/bulletins/11035019.md), 2026-07-15, Service campaign: ENGINE. Certain vehicles listed above, may have a condition where coolant leaks from the radiator hose quick connect at the radiator inlet. This special coverage covers the condition described above for a period of 5 years or 60,000 miles \(100,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after July 14, 2026, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to July 14, 2026, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to remove the inlet hose and replace the seal. The repairs will be made at no charge to the customer. - [N262552620](/bulletins/11032588.md), 2026-05-11, Service campaign: ENGINE. Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate and a diagnostic trouble code will set. This special coverage covers the condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May 11, 2026, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to May 11, 2026, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the cylinder 2 glow plug as necessary. The repairs will be made at no charge to the customer. - [N252515590](/bulletins/11027795.md), 2026-01-27, Service campaign: ELECTRICAL SYSTEM. Certain vehicles listed above, may have a condition in which the body\-to\-chassis ground strap may be corroded. Dealers will replace the ground strap. - [N252494003\-02](/bulletins/11027714.md), 2026-01-21, Service campaign: ENGINE. Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May 23, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to May 23, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the engine. The repairs will be made at no charge to the customer. - [PIE0815A](/bulletins/11026107.md), 2025-12-04, Service bulletin: ENGINE. This engineering information \(EI\) closure ends the need for gathering further information from technicians/field in regard to the Service Engine Soon \(SES\) Lamp illuminated on DIC, Suspect Non\-OE Catalytic Converters and/or Exhaust Systems w/DTCs P013F, P014A, P014B and/or P013E Set. - [25\-NA\-147](/bulletins/11026093.md), 2025-12-04, Service bulletin: ENGINE. this bulletin provides a procedure to verify if the ECM is at the latest update before testing the fuel system. - [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. - [25\-NA\-339](/bulletins/11025492.md), 2025-11-12, Service bulletin: ENGINE. Under Field Actions N252494000, N252494001, the service procedure includes performing a PICO test on vehicle engines within the identified suspect VIN population. If the engine passes the PICO test, the engine oil will be changed from 0W20 to Mobil 1 Supercar 0W40 dexosR. From that point forward, the engine must use 0W40 dexosR oil products for all future oil change services. - [N252508360](/bulletins/11024775.md), 2025-11-03, Warranty extension: ENGINE. Special Coverage. Certain vehicles listed above may have a condition that could cause the turbocharger to fail. If this condition occurs, the Malfunction Indicator Lamp \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Additionally, a message may be displayed indicating the vehicle’s available engine power is reduced. This special coverage covers the condition described above for a period of 15 years or 150,000 miles \(240,000 km\), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after November 3, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to November 3, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage \(“Customers”\) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the turbocharger as necessary. The repairs will be made at no charge to the customer. JSON: [/v1/bulletins/10231893](/v1/bulletins/10231893) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2022-NA-115&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10231893&vehicle=Service%20bulletin%2022-NA-115)