# Service bulletin 21\-NA\-124 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: 10228888 - Published by NHTSA: 2023\-01\-06 - Manufacturer's number: 21\-NA\-124 - Manufacturer's date: 2022\-12\-14 - NHTSA component: ENGINE AND ENGINE COOLING ## NHTSA's summary This service bulletin provides diagnostic tips/steps on testing for possible EVAP leaks in the system to correct a customer concern of an MIL Illuminated with DTCs P0442 and/or P0455 Set. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228888-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228888-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine ## Trouble codes named P0442, P0455 ## Vehicles listed - 2006 to 2009 BUICK ALLURE - 2016 to 2019 BUICK CASCADA - 2000 to 2005 BUICK CENTURY - 2008 to 2023 BUICK ENCLAVE - 2013 to 2022 BUICK ENCORE - 2023 BUICK ENCORE - 2020 to 2023 BUICK ENCORE GX - 2016 to 2023 BUICK ENVISION - 2005 to 2019 BUICK LACROSSE - 2020 BUICK LACROSSE - 2000 to 2005 BUICK LESABRE - 2006 BUICK LESABRE - 2013 BUICK LESABRE - 2006 to 2011 BUICK LUCERNE - 2012 BUICK LUCERNE - 2000 to 2005 BUICK PARK AVENUE - 2003 BUICK RAINIER - 2004 to 2007 BUICK RAINIER - 2000 to 2004 BUICK REGAL - 2005 BUICK REGAL - 2008 to 2010 BUICK REGAL - 2011 to 2020 BUICK REGAL - 2018 BUICK REGAL TOURX - 2000 BUICK RENDEZVOUS - 2001 to 2007 BUICK RENDEZVOUS - 2000 BUICK RIVIERA - 2000 BUICK SKYLARK - 2005 to 2007 BUICK TERRAZA - 2008 BUICK TERRAZA - 2012 to 2017 BUICK VERANO - 2013 to 2019 CADILLAC ATS - 2015 to 2018 CADILLAC ATS\-V - 2000 to 2001 CADILLAC CATERA - 2002 to 2003 CADILLAC CATERA - 2020 to 2023 CADILLAC CT4 - 2020 to 2023 CADILLAC CT5 - 2013 to 2015 CADILLAC CT6 - 2016 to 2020 CADILLAC CT6 - 2021 CADILLAC CT6 - 2003 to 2019 CADILLAC CTS - 2004 to 2007 CADILLAC CTS\-V - 2010 to 2012 CADILLAC CTS\-V - 2014 to 2016 CADILLAC CTS\-V - 2018 CADILLAC CTS\-V - 2000 to 2005 CADILLAC DEVILLE - 2004 to 2005 CADILLAC DTS - 2006 to 2011 CADILLAC DTS - 2012 CADILLAC DTS - 2000 to 2002 CADILLAC ELDORADO - 2000 to 2023 CADILLAC ESCALADE - 2003 to 2016 CADILLAC ESCALADE ESV - 2017 to 2023 CADILLAC ESCALADE ESV - 2007 to 2014 CADILLAC ESCALADE EXT - 2002 to 2011 CADILLAC ESCALADE EXT 1500 - 2008 to 2014 CADILLAC ESCALADE HYBRID - 2021 CADILLAC ESCALADE NA - 2000 to 2004 CADILLAC SEVILLE - 2000 CADILLAC SLS - 2002 CADILLAC SLS - 2004 CADILLAC SLS - 2004 to 2016 CADILLAC SRX - 2017 to 2019 CADILLAC SRX - 2000 to 2004 CADILLAC STS - 2005 to 2011 CADILLAC STS - 2012 CADILLAC STS - 2003 to 2009 CADILLAC XLR - 2018 CADILLAC XT4 - 2019 to 2023 CADILLAC XT4 - 2013 to 2016 CADILLAC XT5 - 2017 to 2023 CADILLAC XT5 - 2020 to 2023 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2020 CADILLAC XTS - 2014 to 2015 CHEVROLET 3500 - 2016 CHEVROLET 3500 - 2017 to 2019 CHEVROLET 3500 - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2022 CHEVROLET 3500 - 2016 CHEVROLET 4500 - 2017 to 2019 CHEVROLET 4500 - 2020 CHEVROLET 4500 - 2022 CHEVROLET 4500 - 2017 to 2022 CHEVROLET 4500HD - 2017 to 2022 CHEVROLET 4500XD - 2017 to 2022 CHEVROLET 5500HD - 2018 to 2022 CHEVROLET 5500XD - 2019 CHEVROLET 6500 - 2022 CHEVROLET 6500HD - 2000 CHEVROLET 6H - 2000 CHEVROLET 7H - 2000 to 2002 CHEVROLET ALERO EXPORT - 2000 to 2005 CHEVROLET ASTRO - 2007 to 2013 CHEVROLET AVALANCHE - 2014 CHEVROLET AVALANCHE - 2002 to 2013 CHEVROLET AVALANCHE 1500 - 2002 to 2007 CHEVROLET AVALANCHE 2500 - 2013 CHEVROLET AVALANCHE 2500 - 2004 to 2018 CHEVROLET AVEO - 2000 to 2001 CHEVROLET B SERIES - 2000 CHEVROLET B6 MEDIUM DUTY - 2000 to 2002 CHEVROLET B7 - 2000 CHEVROLET B7 MEDIUM DUTY - 2000 CHEVROLET BEAUVILLE - 2002 CHEVROLET BERETTA - 2000 to 2005 CHEVROLET BLAZER - 2006 to 2009 CHEVROLET BLAZER - 2019 to 2023 CHEVROLET BLAZER - 2003 to 2009 CHEVROLET C SERIES - 2000 to 2001 CHEVROLET C10 - 2018 CHEVROLET C3500 - 2003 to 2010 CHEVROLET C4500 - 2008 CHEVROLET C4500 NA - 2003 to 2008 CHEVROLET C5500 - 2000 to 2009 CHEVROLET C6500 - 2000 to 2009 CHEVROLET C7500 - 2008 CHEVROLET C7500NA - 2003 to 2009 CHEVROLET C8500 - 2000 to 2002 CHEVROLET CAMARO - 2010 to 2023 CHEVROLET CAMARO - 2003 to 2004 CHEVROLET CAPRICE - 2011 to 2018 CHEVROLET CAPRICE - 2012 to 2017 CHEVROLET CAPRICE POLICE PURSUIT - 2008 to 2018 CHEVROLET CAPTIVA - 2009 CHEVROLET CAPTIVA SPORT - 2010 to 2012 CHEVROLET CAPTIVA SPORT - 2000 to 2005 CHEVROLET CAVALIER - 2014 to 2017 CHEVROLET CHEVEROLET SS - 2000 to 2001 CHEVROLET CHEVY VAN - 2003 CHEVROLET CHEVY VAN - 2017 CHEVROLET CHEYENNE - 2015 to 2016 CHEVROLET CITY EXPRESS - 2018 CHEVROLET CITY EXPRESS - 2004 to 2006 CHEVROLET CLASSIC - 2000 CHEVROLET COBALT - 2002 CHEVROLET COBALT - 2005 to 2010 CHEVROLET COBALT - 2011 to 2017 CHEVROLET COBALT - 2008 to 2010 CHEVROLET COBALT SS - 2004 to 2012 CHEVROLET COLORADO - 2013 to 2014 CHEVROLET COLORADO - 2015 to 2023 CHEVROLET COLORADO - 2000 to 2001 CHEVROLET CONVENTIONAL - 2003 CHEVROLET CONVENTIONAL - 2000 to 2023 CHEVROLET CORVETTE - 2005 to 2008 CHEVROLET CORVETTE Z06 - 2009 CHEVROLET CORVETTE ZR1 - 2010 to 2019 CHEVROLET CRUZE - 2000 to 2006 CHEVROLET DENALI - 2000 to 2002 CHEVROLET ENVOY - 2005 CHEVROLET EPICA - 2005 to 2023 CHEVROLET EQUINOX - 2000 CHEVROLET EXPLORER - 2002 CHEVROLET EXPLORER - 2000 to 2021 CHEVROLET EXPRESS - 2000 to 2012 CHEVROLET EXPRESS 1500 - 2014 CHEVROLET EXPRESS 1500 - 2000 to 2011 CHEVROLET EXPRESS 2500 - 2014 CHEVROLET EXPRESS 2500 - 2023 CHEVROLET EXPRESS 2500 - 2000 to 2010 CHEVROLET EXPRESS 3500 - 2012 CHEVROLET EXPRESS 3500 - 2014 CHEVROLET EXPRESS 3500 - 2023 CHEVROLET EXPRESS 3500 - 2009 CHEVROLET EXPRESS 4500 - 2012 CHEVROLET EXPRESS 4500 - 2014 CHEVROLET EXPRESS 4500 - 2016 CHEVROLET EXPRESS 4500 - 2013 CHEVROLET EXPRESS CUTAWAY - 2006 to 2008 CHEVROLET EXPRESS CUTAWAY VAN - 2000 to 2001 CHEVROLET F SERIES - 2004 to 2006 CHEVROLET F SERIES - 2000 to 2001 CHEVROLET F6 - 2000 to 2001 CHEVROLET F7 - 2000 to 2003 CHEVROLET G SERIES - 2000 to 2002 CHEVROLET G VAN - 2000 to 2011 CHEVROLET G VAN BUS - 2003 to 2008 CHEVROLET G1500 - 2000 to 2002 CHEVROLET G25 - 2003 to 2005 CHEVROLET G2500 - 2001 to 2002 CHEVROLET G30 - 2000 to 2002 CHEVROLET G35 - 2003 to 2005 CHEVROLET G3500 - 2008 CHEVROLET G3500 - 2018 CHEVROLET G4500 - 2001 CHEVROLET H SERIES - 2006 to 2011 CHEVROLET HHR - 2000 to 2020 CHEVROLET IMPALA - 2006 CHEVROLET IMPALA \(GMX 211\) - 2000 to 2005 CHEVROLET INCOMPLETE/CUTAWAY C3 - 2000 to 2002 CHEVROLET JIMMY - 2000 to 2002 CHEVROLET L SERIES - 2000 to 2002 CHEVROLET L VAN - 2016 to 2019 CHEVROLET LOW CAB FORWARD 3500 - 2016 to 2017 CHEVROLET LOW CAB FORWARD 4500 - 2016 to 2017 CHEVROLET LOW CAB FORWARD 5500 - 2018 CHEVROLET LOW CAB FORWARD 6500 - 2000 to 2001 CHEVROLET LUMINA - 2002 CHEVROLET LUMINA - 2008 CHEVROLET LUMINA ## 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 - [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 - [16V868000](/recalls/nhtsa/16V868000.md), 2016-12-02: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN - [15V701000](/recalls/nhtsa/15V701000.md), 2015-10-26: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE; ENGINE AND ENGINE COOLING:ENGINE - [2015501](/recalls/tc/2015501.md), 2015-10-23: Engine - [15V201000](/recalls/nhtsa/15V201000.md), 2015-04-06: ENGINE AND ENGINE COOLING:ENGINE - [2015145](/recalls/tc/2015145.md), 2015-04-02: Engine - [2014577](/recalls/tc/2014577.md), 2014-12-18: Engine ## Other bulletins for the same vehicles and component - [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. - [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. - [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. - [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. - [22\-NA\-080](/bulletins/11024330.md), 2025-10-16, Service bulletin: ENGINE. This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder. 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