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Service bulletin 19NA256

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10205052
Published by NHTSA2021-12-20
Manufacturer's number19NA256
Manufacturer's date2021-08-20
NHTSA componentENGINE

NHTSA's summary

This service bulletin provides diagnostic aid information/procedures to perform inspections to determine if the engine needs to be replaced as opposed to just internal parts for knocking, rattle, squeak and/or squeal type noises from engine.

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

Vehicles listed
BUICK ENCLAVE2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
BUICK LACROSSE2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
BUICK REGAL2017, 2018, 2019, 2020
CADILLAC ATS2013, 2014, 2015, 2016, 2017, 2018, 2019
CADILLAC CT42022
CADILLAC CT52020, 2021, 2022
CADILLAC CT62016, 2017, 2018, 2019, 2020
CADILLAC CTS2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
CADILLAC SRX2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
CADILLAC STS2007, 2008, 2009, 2010, 2011
CADILLAC XT52017, 2018, 2019, 2020, 2021, 2022
CADILLAC XT62020, 2021, 2022
CADILLAC XTS2013, 2014, 2015, 2016, 2017, 2018, 2019
CHEVROLET BLAZER2019, 2020, 2021, 2022
CHEVROLET CAMARO2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET CAPRICE2012 to 2013
CHEVROLET CAPTIVA2013 to 2015
CHEVROLET CAPTIVA SPORT2012
CHEVROLET COLORADO2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
CHEVROLET EQUINOX2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
CHEVROLET IMPALA2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
CHEVROLET MALIBU2008, 2009, 2010, 2011, 2012, 2013
CHEVROLET TRAVERSE2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC ACADIA2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC CANYON2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
GMC TERRAIN2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
GMC TERRAIN2019
PONTIAC G62008, 2009, 2010
PONTIAC G82008, 2009
PONTIAC TORRENT2008, 2009
SATURN AURA2007, 2008, 2009
SATURN OUTLOOK2007, 2008, 2009, 2010
SATURN VUE2008, 2009, 2010

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20101702010-05-28. Engine
10V2230002010-05-25. ENGINE AND ENGINE COOLING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
00-06-01-026R2025-12-03. Service bulletin. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
23-NA-1702025-10-25. Service bulletin. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
23-NA-1532025-10-25. Service bulletin. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
N2525083502025-10-21. Service campaign. Certain vehicles listed above, may have a condition that could cause the engine coolant thermostat to open at a lower temperature than intended. If this condition were to occur, the Malfunction Indicator Lamp (Check Engine Light) will illuminate and a diagnostic trouble code will set. Additionally in some cases, the engine cooling fans may run after the engine is switched off. 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 October 21, 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 October 21, 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 coolant thermostat as necessary. The repairs will be made at no charge to the customer.
22-NA-0802025-10-16. Service bulletin. This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder.
15-NA-0102025-07-07. Service bulletin. This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in other states.
25-NA-0372025-06-26. Service bulletin. This bulletin advises the tech that the Exhaust Roller Follower may be the issue with the engine Ticking noise, misfire or rough run and what to replace if found the cause.
24-NA-0682025-06-16. Service bulletin. This service bulletin provides a procedure to test and replace the battery distribution fuse block if found the cause of the DTC and electric coolant pump inoperative.
21-NA-2402025-06-16. Service bulletin. This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
PIE0794E2025-06-12. Service bulletin. This engineering information (EI Lite) ends the need for gathering further information using the Field Product Reporting (FPR) App process for vehicles where customers comment on having oil leaking from the oil pan that drives a warrantable item type of repair on said vehicles.