Service bulletin 03-00-91-001I
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 | 10245395 |
| Published by NHTSA | 2023-11-22 |
| Manufacturer's number | 03-00-91-001I |
| Manufacturer's date | 2023-11-06 |
| NHTSA component | WHEELS; POWER TRAIN; STEERING; SUSPENSION; ENGINE AND ENGINE COOLING |
NHTSA's summary
This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine, Steering, Suspension, Transmission and driveline, Wheels
| BUICK ALLURE | 2006, 2007, 2008, 2009 |
|---|---|
| BUICK CASCADA | 2016, 2017, 2018, 2019 |
| BUICK CENTURY | 2004, 2005 |
| BUICK ENCLAVE | 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| BUICK ENCORE | 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| BUICK ENCORE | 2023 to 2024 |
| BUICK ENCORE GX | 2020, 2021, 2022, 2023, 2024 |
| BUICK ENVISION | 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| BUICK ENVISTA | 2024 |
| BUICK LACROSSE | 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| BUICK LACROSSE | 2020 |
| BUICK LESABRE | 2004, 2005 |
| BUICK LESABRE | 2006 |
| BUICK LESABRE | 2013 |
| BUICK LUCERNE | 2006, 2007, 2008, 2009, 2010, 2011 |
| BUICK LUCERNE | 2012 |
| BUICK PARK AVENUE | 2004, 2005 |
| BUICK RAINIER | 2004, 2005, 2006, 2007 |
| BUICK REGAL | 2004 |
| BUICK REGAL | 2005 |
| BUICK REGAL | 2008 to 2010 |
| BUICK REGAL | 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 |
| BUICK REGAL TOURX | 2018 |
| BUICK REGAL TOURX | 2020 |
| BUICK RENDEZVOUS | 2004, 2005, 2006, 2007 |
| BUICK TERRAZA | 2005, 2006, 2007 |
| BUICK TERRAZA | 2008 |
| BUICK VERANO | 2012, 2013, 2014, 2015, 2016, 2017 |
| CADILLAC ATS | 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| CADILLAC ATS-V | 2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC CT4 | 2020, 2021, 2022, 2023, 2024 |
| CADILLAC CT5 | 2020, 2021, 2022, 2023, 2024 |
| CADILLAC CT6 | 2013 to 2015 |
| CADILLAC CT6 | 2016, 2017, 2018, 2019, 2020 |
| CADILLAC CT6 | 2021 |
| CADILLAC CTS | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| CADILLAC CTS-V | 2004, 2005, 2006, 2007 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC CTS-V | 2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC CTS-V | 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC CTS-V | 2018 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC DEVILLE | 2004, 2005 |
| CADILLAC DTS | 2004 to 2005 |
| CADILLAC DTS | 2006, 2007, 2008, 2009, 2010, 2011 |
| CADILLAC DTS | 2012 |
| CADILLAC ELR | 2014, 2015, 2016, 2017 |
| CADILLAC ESCALADE | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CADILLAC ESCALADE ESV | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE ESV | 2017, 2018, 2019, 2020, 2021, 2022, 2023 |
| CADILLAC ESCALADE EXT | 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE EXT 1500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE HYBRID | 2008, 2009, 2010, 2011, 2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC ESCALADE NA | 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CADILLAC LYRIQ | 2023, 2024 |
| CADILLAC SEVILLE | 2004 |
| CADILLAC SLS | 2004 |
| CADILLAC SRX | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 |
| CADILLAC STS | 2004 |
| CADILLAC STS | 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| CADILLAC STS | 2012 |
| CADILLAC XLR | 2004, 2005, 2006, 2007, 2008, 2009 |
| CADILLAC XT4 | 2018 |
| CADILLAC XT4 | 2019, 2020, 2021, 2022, 2023, 2024 |
| CADILLAC XT5 | 2013 to 2016 |
| CADILLAC XT5 | 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CADILLAC XT6 | 2020, 2021, 2022, 2023, 2024 |
| CADILLAC XTS | 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| CADILLAC XTS | 2020 |
| CADILLAC redundant LYRIQ | 2024 |
| CHEVROLET 3500 | 2014 to 2015 |
| CHEVROLET 3500 | 2016 |
| CHEVROLET 3500 | 2017 to 2019 |
| CHEVROLET 3500 | 2020 |
| CHEVROLET 3500 | 2021 |
| CHEVROLET 3500 | 2022 |
| CHEVROLET 3500HD | 2024 |
| CHEVROLET 4500 | 2016 |
| CHEVROLET 4500 | 2017 to 2019 |
| CHEVROLET 4500 | 2020 |
| CHEVROLET 4500 | 2022 |
| CHEVROLET 4500HD | 2017, 2018, 2019, 2020, 2021, 2022, 2023 |
| CHEVROLET 4500XD | 2017, 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET 5500HD | 2017, 2018, 2019, 2020, 2021, 2022, 2023 |
| CHEVROLET 5500XD | 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET 6500 | 2019 |
| CHEVROLET 6500HD | 2019 to 2023 |
| CHEVROLET ASTRO | 2004 to 2005 |
| CHEVROLET AVALANCHE | 2007, 2008, 2009, 2010, 2011, 2012, 2013 |
| CHEVROLET AVALANCHE | 2014 |
| CHEVROLET AVALANCHE 1500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET AVALANCHE 2500 | 2004, 2005, 2006, 2007 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET AVALANCHE 2500 | 2013 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET AVEO | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| CHEVROLET BLAZER | 2004, 2005 |
| CHEVROLET BLAZER | 2006 to 2009 |
| CHEVROLET BLAZER | 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET BLAZER EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET BOLT EUV | 2022, 2023 |
| CHEVROLET BOLT EV | 2017, 2018, 2019, 2020, 2021, 2022, 2023 |
| CHEVROLET BOLT EV | 2024 |
| CHEVROLET C SERIES | 2004 to 2009 |
| CHEVROLET C3500 | 2018 |
| CHEVROLET C4500 | 2004 to 2010 |
| CHEVROLET C4500 NA | 2008 |
| CHEVROLET C5500 | 2004 to 2008 |
| CHEVROLET C6500 | 2004 to 2009 |
| CHEVROLET C7500 | 2004 to 2009 |
| CHEVROLET C7500NA | 2008 |
| CHEVROLET C8500 | 2004 to 2009 |
| CHEVROLET CAMARO | 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET CAPRICE | 2004 |
| CHEVROLET CAPRICE | 2011 to 2018 |
| CHEVROLET CAPRICE POLICE PURSUIT | 2012 to 2017 |
| CHEVROLET CAPTIVA | 2008 to 2018 |
| CHEVROLET CAPTIVA SPORT | 2009 |
| CHEVROLET CAPTIVA SPORT | 2010, 2011, 2012, 2013, 2014 |
| CHEVROLET CAVALIER | 2004, 2005 |
| CHEVROLET CHEVEROLET SS | 2014 to 2017 |
| CHEVROLET CITY EXPRESS | 2015, 2016 |
| CHEVROLET CITY EXPRESS | 2018 |
| CHEVROLET CLASSIC | 2004 to 2006 |
| CHEVROLET COBALT | 2005, 2006, 2007, 2008, 2009, 2010 |
| CHEVROLET COBALT SS | 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET COLORADO | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
| CHEVROLET COLORADO | 2013 to 2014 |
| CHEVROLET COLORADO | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET CORVETTE | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET CORVETTE Z06 | 2005, 2006, 2007, 2008 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CORVETTE ZR1 | 2009 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET CRUZE | 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| CHEVROLET DENALI | 2004 to 2006 |
| CHEVROLET EPICA | 2005 |
| CHEVROLET EQUINOX | 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET EQUINOX EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 |
| CHEVROLET EXPRESS 1500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 2500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 2500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 2500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2012 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 3500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 4500 | 2009 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 4500 | 2012 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 4500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS 4500 | 2016 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS CUTAWAY | 2013 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET EXPRESS CUTAWAY VAN | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET F SERIES | 2004 to 2006 |
| CHEVROLET G VAN BUS | 2004 to 2011 |
| CHEVROLET G1500 | 2004 to 2008 |
| CHEVROLET G2500 | 2004 to 2005 |
| CHEVROLET G3500 | 2004 to 2005 |
| CHEVROLET G3500 | 2008 |
| CHEVROLET G4500 | 2018 |
| CHEVROLET HHR | 2006, 2007, 2008, 2009, 2010, 2011 |
| CHEVROLET IMPALA | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 |
| CHEVROLET IMPALA (GMX 211) | 2006 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET INCOMPLETE/CUTAWAY C3 | 2004 to 2005 |
| CHEVROLET LOW CAB FORWARD 3500 | 2016 to 2019 |
| CHEVROLET LOW CAB FORWARD 4500 | 2016 to 2017 |
| CHEVROLET LOW CAB FORWARD 5500 | 2016 to 2017 |
| CHEVROLET LOW CAB FORWARD 6500 | 2018 |
| CHEVROLET LUMINA | 2008 |
| CHEVROLET LUMINA | 2014 |
| CHEVROLET MALIBU | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 |
| CHEVROLET MALIBU CLASSIC | 2004, 2005 |
| CHEVROLET MALIBU CLASSIC | 2007 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET MALIBU ECO | 2013, 2014 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET MALIBU HYBRID | 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET MALIBU HYBRID | 2016, 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET MALIBU MAXX | 2004, 2005, 2006, 2007 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET MONTE CARLO | 2004, 2005, 2006, 2007 |
| CHEVROLET MONTE CARLO | 2008 |
| CHEVROLET MONTE CARLO | 2010 |
| CHEVROLET N300 | 2014 to 2016 |
| CHEVROLET N300 | 2018 |
| CHEVROLET N300 MAX | 2017 |
| CHEVROLET OPTRA | 2004, 2005, 2006, 2007 |
| CHEVROLET S/T BLAZER | 2004 to 2005 |
| CHEVROLET S10 | 2004 to 2007 |
| CHEVROLET S10 | 2016 to 2018 |
| CHEVROLET SILVERADO 1500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 1500 HD | 2004, 2005 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 3500 | 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 4500 | 2019, 2020, 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 5500 | 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 5500 | 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 6500 | 2019 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 6500 | 2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2024 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO LT | 2018 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SONIC | 2011 |
| CHEVROLET SONIC | 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 |
| CHEVROLET SPARK | 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022 |
| CHEVROLET SPARK EV | 2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SS | 2018 |
| CHEVROLET SSR | 2004, 2005, 2006 |
And 173 more lines, in the JSON.
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 26V289000 | 2026-05-07. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE) |
|---|---|
| 2026089 | 2026-02-26. Suspension |
| 26V113000 | 2026-02-26. SUSPENSION:REAR |
| 26V085000 | 2026-02-13. POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE |
| 2026061 | 2026-02-12. Powertrain |
| 2025225 | 2025-04-24. Engine |
| 25V274000 | 2025-04-24. ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL |
| 2025144 | 2025-03-20. Steering |
| 25V175000 | 2025-03-20. STEERING:ELECTRIC POWER ASSIST SYSTEM |
| 2025118 | 2025-03-06. Powertrain |
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| N262570770-03 | 2026-10-16. Service campaign. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator. |
|---|---|
| N262570770-02 | 2026-09-25. Service campaign. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator. |
| N262570770-01 | 2026-09-18. Service campaign. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator. |
| N262570770 | 2026-09-15. Service campaign. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator. |
| N252502891-01 | 2026-08-20. Service campaign. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the rear electric drive transmission module. |
| N252502890-01 | 2026-08-20. Service campaign. Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will review the vehicles service history in IVH, and if necessary, replace the front electric drive transmission module. |
| N242471460-01 | 2026-08-20. Service campaign. Certain vehicles may have been built with an Electric Drive Unit mounting bolt that is too long, causing damage to the Drive Unit case. Dealers will inspect and replace the Electrical Drive Unit if necessary. |
| N262552620 | 2026-05-11. Service campaign. 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. |
| N252536751-01 | 2026-04-20. Warranty extension. Special Coverage. Certain vehicles listed above may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. 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 April 17, 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 April 17, 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 update the control valve body spacer plate, actuator feed valve and spring in the valve body. The repairs will be made at no charge to the customer. |
| N252536751 | 2026-04-17. Warranty extension. Special Coverage. Certain vehicles listed above may have a condition where the transmission control valve has worn, resulting in a gradual loss of pressure within the valve. The effects can cause harsh shifting, setting a service engine soon message, reduced engine performance or P0747 diagnostic trouble code. Dealers are to update the control valve body spacer plate, actuator feed valve and spring in the valve body. The repairs will be made at no charge to the customer. |