# Service bulletin 010601011L 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: 10186104 - Published by NHTSA: 2021\-02\-01 - Manufacturer's number: 010601011L - Manufacturer's date: 2020\-12\-16 - NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT ## NHTSA's summary This informational bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186104-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10186104-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine, Equipment and accessories ## Vehicles listed - 2016 to 2019 BUICK CASCADA - 2005 BUICK CENTURY - 2008 to 2021 BUICK ENCLAVE - 2013 to 2021 BUICK ENCORE - 2020 to 2021 BUICK ENCORE GX - 2016 to 2021 BUICK ENVISION - 2005 to 2019 BUICK LACROSSE - 2005 BUICK LESABRE - 2006 BUICK LESABRE - 2006 to 2011 BUICK LUCERNE - 2012 BUICK LUCERNE - 2005 BUICK PARK AVENUE - 2005 to 2007 BUICK RAINIER - 2005 BUICK REGAL - 2011 to 2020 BUICK REGAL - 2005 to 2007 BUICK RENDEZVOUS - 2005 to 2007 BUICK TERRAZA - 2008 BUICK TERRAZA - 2012 to 2017 BUICK VERANO - 2013 to 2019 CADILLAC ATS - 2020 to 2021 CADILLAC CT4 - 2020 to 2021 CADILLAC CT5 - 2016 to 2020 CADILLAC CT6 - 2005 to 2019 CADILLAC CTS - 2014 CADILLAC CTS\-V - 2005 CADILLAC DEVILLE - 2006 to 2011 CADILLAC DTS - 2014 to 2017 CADILLAC ELR - 2005 to 2020 CADILLAC ESCALADE - 2005 to 2016 CADILLAC ESCALADE ESV - 2017 to 2021 CADILLAC ESCALADE ESV - 2007 to 2013 CADILLAC ESCALADE EXT - 2005 to 2006 CADILLAC ESCALADE EXT 1500 - 2021 CADILLAC ESCALADE NA - 2005 to 2016 CADILLAC SRX - 2005 to 2011 CADILLAC STS - 2005 to 2009 CADILLAC XLR - 2019 to 2021 CADILLAC XT4 - 2017 to 2021 CADILLAC XT5 - 2020 to 2021 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2005 CHEVROLET ASTRO - 2007 to 2013 CHEVROLET AVALANCHE - 2005 to 2006 CHEVROLET AVALANCHE 1500 - 2005 to 2006 CHEVROLET AVALANCHE 2500 - 2005 to 2006 CHEVROLET AVEO - 2009 to 2011 CHEVROLET AVEO - 2005 CHEVROLET BLAZER - 2019 to 2021 CHEVROLET BLAZER - 2017 to 2021 CHEVROLET BOLT EV - 2005 to 2009 CHEVROLET C SERIES - 2010 to 2021 CHEVROLET CAMARO - 2011 to 2016 CHEVROLET CAPRICE - 2013 to 2015 CHEVROLET CAPTIVA - 2005 CHEVROLET CAVALIER - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2015 to 2016 CHEVROLET CITY EXPRESS - 2005 to 2010 CHEVROLET COBALT - 2005 to 2012 CHEVROLET COLORADO - 2015 to 2021 CHEVROLET COLORADO - 2005 to 2021 CHEVROLET CORVETTE - 2011 to 2019 CHEVROLET CRUZE - 2005 to 2021 CHEVROLET EQUINOX - 2005 to 2021 CHEVROLET EXPRESS - 2006 to 2011 CHEVROLET HHR - 2005 to 2020 CHEVROLET IMPALA - 2005 to 2021 CHEVROLET MALIBU - 2005 to 2007 CHEVROLET MONTE CARLO - 2006 to 2012 CHEVROLET SILVERADO 1500 - 2014 CHEVROLET SILVERADO 1500 - 2017 to 2021 CHEVROLET SILVERADO 1500 - 2005 CHEVROLET SILVERADO 1500 HD - 2005 to 2012 CHEVROLET SILVERADO 2500 - 2014 to 2021 CHEVROLET SILVERADO 2500 - 2019 to 2020 CHEVROLET SILVERADO 4500 - 2012 to 2020 CHEVROLET SONIC - 2013 to 2015 CHEVROLET SPARK - 2017 to 2020 CHEVROLET SPARK - 2014 to 2017 CHEVROLET SPARK EV - 2005 to 2006 CHEVROLET SSR - 2005 to 2021 CHEVROLET SUBURBAN - 2005 CHEVROLET T SERIES - 2010 CHEVROLET T SERIES - 2005 to 2021 CHEVROLET TAHOE - 2005 to 2009 CHEVROLET TRAILBLAZER - 2021 CHEVROLET TRAILBLAZER - 2009 to 2021 CHEVROLET TRAVERSE - 2013 to 2021 CHEVROLET TRAX - 2005 to 2009 CHEVROLET UPLANDER - 2005 CHEVROLET VENTURE - 2011 to 2019 CHEVROLET VOLT - 2007 to 2021 GMC ACADIA - 2005 to 2006 GMC C SERIES - 2005 to 2012 GMC CANYON - 2015 to 2021 GMC CANYON - 2005 to 2009 GMC ENVOY - 2002 to 2004 GMC ENVOY XL - 2006 GMC ENVOY XL - 2005 GMC ENVOY XUV - 2000 to 2004 GMC JIMMY - 2005 GMC JIMMY CLASSIC - 2005 GMC SAFARI - 2005 to 2021 GMC SAVANA - 2014 GMC SIERRA 1500 - 2019 to 2021 GMC SIERRA 1500 - 2007 to 2018 GMC SIERRA 2500 - 2020 to 2021 GMC SIERRA 2500 - 2007 to 2013 GMC SIERRA DENALI - 2015 to 2019 GMC SIERRA DENALI - 2010 to 2021 GMC TERRAIN - 2000 to 2013 GMC TOPKICK - 2005 to 2021 GMC YUKON - 2005 to 2013 GMC YUKON DENALI - 2005 to 2013 GMC YUKON DENALI XL - 2005 to 2011 GMC YUKON XL - 2012 to 2014 GMC YUKON XL - 2015 to 2021 GMC YUKON XL - 2005 to 2010 HUMMER H2 - 2006 to 2010 HUMMER H3 - 2001 to 2005 PONTIAC AZTEK - 2000 to 2005 PONTIAC BONNEVILLE - 2006 PONTIAC BONNEVILLE - 2008 to 2010 PONTIAC G3 - 2007 to 2010 PONTIAC G5 - 2005 to 2010 PONTIAC G6 - 2008 to 2010 PONTIAC G8 - 2000 to 2005 PONTIAC GRAND AM - 2000 to 2008 PONTIAC GRAND PRIX - 2005 to 2006 PONTIAC GTO - 2007 PONTIAC GTO - 2005 to 2009 PONTIAC MONTANA - 2005 to 2006 PONTIAC PURSUIT - 2007 to 2009 PONTIAC PURSUIT - 2006 to 2010 PONTIAC SOLSTICE - 2000 to 2005 PONTIAC SUNFIRE - 2006 to 2009 PONTIAC TORRENT - 2005 to 2010 PONTIAC VIBE - 2005 to 2009 SAAB 9\-7X - 2008 to 2009 SATURN ASTRA - 2010 SATURN ASTRA - 2007 to 2010 SATURN AURA - 2003 to 2007 SATURN ION - 2005 SATURN L200 - 2005 SATURN L300 - 2007 to 2010 SATURN OUTLOOK - 2005 to 2007 SATURN RELAY - 2008 SATURN RELAY - 2007 to 2010 SATURN SKY - 2005 to 2010 SATURN VUE ## 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 - [2022160](/recalls/tc/2022160.md), 2022-03-31: Accessories - [21V496000](/recalls/nhtsa/21V496000.md), 2021-07-01: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER - [21V346000](/recalls/nhtsa/21V346000.md), 2021-05-13: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE - [2020165](/recalls/tc/2020165.md), 2020-04-16: Accessories - [2019494](/recalls/tc/2019494.md), 2019-10-03: Accessories - [2019449](/recalls/tc/2019449.md), 2019-09-06: Engine - [19V642000](/recalls/nhtsa/19V642000.md), 2019-09-06: ENGINE; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS - [19V428000](/recalls/nhtsa/19V428000.md), 2019-06-11: EQUIPMENT ## Other bulletins for the same vehicles and component - [N262576260](/bulletins/11038468.md), 2026-10-15, Service campaign: ENGINE. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition that could cause a small exhaust leak at the catalytic converter inlet. Dealers are to replace the catalytic converter inlet clamp and to inspect the catalytic converter – replacing it if damage is observed. 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. - [N262548050](/bulletins/11031551.md), 2026-04-24, Service bulletin: ENGINE. This message is to inform dealers that Special Coverage N262548050 is being temporarily suspended for the models above. Involved vehicles will be temporarily removed from IVH. Dealers will be notified when repairs can be resumed. We apologize for any inconvenience this situation may cause. - [N262548050](/bulletins/11031510.md), 2026-04-23, Service campaign: ENGINE. Certain vehicles, may have a condition that could cause the Catalytic Converter to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Dealers are to replace the Catalytic Converter as necessary. The repairs will be made at no charge to the customer. - [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. - [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. - [23\-NA\-170](/bulletins/11024486.md), 2025-10-25, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure. - [23\-NA\-153](/bulletins/11024485.md), 2025-10-25, Service bulletin: ENGINE. 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. - [N252508350](/bulletins/11024390.md), 2025-10-21, Service campaign: ENGINE. 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. JSON: [/v1/bulletins/10186104](/v1/bulletins/10186104) [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%20010601011L&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10186104&vehicle=Service%20bulletin%20010601011L)