# Service bulletin 21NA124 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: 10198890 - Published by NHTSA: 2021\-07\-06 - Manufacturer's number: 21NA124 - Manufacturer's date: 2021\-05\-25 - NHTSA component: ELECTRICAL SYSTEM ## 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/2021/MC-10198890-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198890-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Trouble codes named P0442, P0455 ## Vehicles listed - 2016 to 2019 BUICK CASCADA - 2000 to 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 - 2000 to 2005 BUICK LESABRE - 2006 BUICK LESABRE - 2006 to 2011 BUICK LUCERNE - 2012 BUICK LUCERNE - 2000 to 2005 BUICK PARK AVENUE - 2004 to 2007 BUICK RAINIER - 2000 to 2004 BUICK REGAL - 2005 BUICK REGAL - 2011 to 2020 BUICK REGAL - 2002 to 2007 BUICK RENDEZVOUS - 2000 BUICK RIVIERA - 2005 to 2007 BUICK TERRAZA - 2008 BUICK TERRAZA - 2012 to 2017 BUICK VERANO - 2013 to 2019 CADILLAC ATS - 2000 to 2001 CADILLAC CATERA - 2002 CADILLAC CATERA - 2020 to 2021 CADILLAC CT4 - 2020 to 2021 CADILLAC CT5 - 2016 to 2020 CADILLAC CT6 - 2003 to 2019 CADILLAC CTS - 2014 CADILLAC CTS\-V - 2000 to 2005 CADILLAC DEVILLE - 2006 to 2011 CADILLAC DTS - 2000 to 2002 CADILLAC ELDORADO - 2014 to 2017 CADILLAC ELR - 2000 CADILLAC ESCALADE - 2002 to 2020 CADILLAC ESCALADE - 2003 to 2016 CADILLAC ESCALADE ESV - 2017 to 2021 CADILLAC ESCALADE ESV - 2007 to 2013 CADILLAC ESCALADE EXT - 2002 to 2006 CADILLAC ESCALADE EXT 1500 - 2021 CADILLAC ESCALADE NA - 2000 to 2004 CADILLAC SEVILLE - 2004 to 2016 CADILLAC SRX - 2005 to 2011 CADILLAC STS - 2004 to 2009 CADILLAC XLR - 2019 to 2021 CADILLAC XT4 - 2017 to 2021 CADILLAC XT5 - 2020 to 2021 CADILLAC XT6 - 2013 to 2019 CADILLAC XTS - 2016 CHEVROLET 3500 - 2018 to 2019 CHEVROLET 3500 - 2020 CHEVROLET 3500 - 2021 CHEVROLET 3500 - 2017 CHEVROLET 4500 - 2017 to 2021 CHEVROLET 4500HD - 2017 to 2021 CHEVROLET 5500HD - 2000 to 2002 CHEVROLET ALERO EXPORT - 2000 to 2005 CHEVROLET ASTRO - 2007 to 2013 CHEVROLET AVALANCHE - 2002 to 2006 CHEVROLET AVALANCHE 1500 - 2002 to 2006 CHEVROLET AVALANCHE 2500 - 2004 to 2006 CHEVROLET AVEO - 2009 to 2018 CHEVROLET AVEO - 2001 CHEVROLET B7 - 2000 CHEVROLET B7 MEDIUM DUTY - 2000 to 2005 CHEVROLET BLAZER - 2019 to 2021 CHEVROLET BLAZER - 2017 to 2021 CHEVROLET BOLT EV - 2003 to 2009 CHEVROLET C SERIES - 2000 to 2002 CHEVROLET CAMARO - 2010 to 2021 CHEVROLET CAMARO - 2003 to 2004 CHEVROLET CAPRICE - 2011 to 2017 CHEVROLET CAPRICE - 2008 CHEVROLET CAPTIVA - 2012 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 CHEVROLET CHEVY VAN - 2017 CHEVROLET CHEYENNE - 2015 to 2016 CHEVROLET CITY EXPRESS - 2004 to 2006 CHEVROLET CLASSIC - 2005 to 2010 CHEVROLET COBALT - 2004 to 2012 CHEVROLET COLORADO - 2014 CHEVROLET COLORADO - 2015 to 2021 CHEVROLET COLORADO - 2001 CHEVROLET CONVENTIONAL - 2003 CHEVROLET CONVENTIONAL - 2000 to 2021 CHEVROLET CORVETTE - 2011 to 2019 CHEVROLET CRUZE - 2005 CHEVROLET EPICA - 2005 to 2021 CHEVROLET EQUINOX - 2000 to 2021 CHEVROLET EXPRESS - 2005 to 2006 CHEVROLET F SERIES - 2000 CHEVROLET G SERIES - 2001 to 2002 CHEVROLET G VAN BUS - 2004 to 2006 CHEVROLET G VAN BUS - 2001 CHEVROLET H SERIES - 2006 to 2011 CHEVROLET HHR - 2000 to 2020 CHEVROLET IMPALA - 2001 to 2002 CHEVROLET L SERIES - 2018 CHEVROLET LOW CAB FORWARD 6500 - 2000 to 2001 CHEVROLET LUMINA - 2002 CHEVROLET LUMINA - 2000 to 2002 CHEVROLET M SERIES - 2001 CHEVROLET M VAN - 2000 to 2021 CHEVROLET MALIBU - 2000 to 2001 CHEVROLET METRO - 2000 to 2007 CHEVROLET MONTE CARLO - 2014 to 2016 CHEVROLET N300 - 2018 CHEVROLET N300 - 2017 CHEVROLET N300 MAX - 2004 to 2007 CHEVROLET OPTRA - 2017 CHEVROLET ORLANDO - 2000 to 2001 CHEVROLET P SERIES - 2000 to 2002 CHEVROLET PRIZM - 2000 to 2004 CHEVROLET S10 - 2016 to 2018 CHEVROLET S10 - 2006 to 2014 CHEVROLET SILVERADO 1500 - 2017 to 2021 CHEVROLET SILVERADO 1500 - 2002 to 2005 CHEVROLET SILVERADO 1500 HD - 2000 to 2021 CHEVROLET SILVERADO 2500 - 2000 to 2001 CHEVROLET SILVERADO 3500 - 2017 CHEVROLET SILVERADO 3500 - 2019 to 2021 CHEVROLET SILVERADO 4500 - 2012 to 2020 CHEVROLET SONIC - 2013 to 2021 CHEVROLET SPARK - 2014 to 2017 CHEVROLET SPARK EV - 2003 to 2006 CHEVROLET SSR - 2000 to 2021 CHEVROLET SUBURBAN - 2003 to 2009 CHEVROLET T SERIES - 2010 CHEVROLET T SERIES - 2000 to 2021 CHEVROLET TAHOE - 2000 to 2004 CHEVROLET TRACKER - 2002 to 2009 CHEVROLET TRAILBLAZER - 2017 to 2020 CHEVROLET TRAILBLAZER - 2021 CHEVROLET TRAILBLAZER - 2000 to 2001 CHEVROLET TRANS SPORT - 2009 to 2021 CHEVROLET TRAVERSE - 2013 to 2021 CHEVROLET TRAX - 2005 to 2009 CHEVROLET UPLANDER - 2000 CHEVROLET V SERIES - 2000 to 2005 CHEVROLET VENTURE - 2011 to 2019 CHEVROLET VOLT - 2000 CHEVROLET W SERIES - 2000 to 2010 CHEVROLET W\-SERIES - 2007 to 2021 GMC ACADIA - 2004 to 2009 GMC C SERIES - 2004 to 2012 GMC CANYON - 2015 to 2021 GMC CANYON - 2000 to 2001 GMC ENVOY - 2002 to 2009 GMC ENVOY - 2006 GMC ENVOY XL - 2004 to 2005 GMC ENVOY XUV - 2000 GMC G SERIES - 2003 GMC G SERIES - 2000 GMC G VAN BUS - 2010 GMC G VAN BUS - 2001 to 2002 GMC GM - 2000 to 2004 GMC JIMMY - 2005 GMC JIMMY CLASSIC - 2000 to 2001 GMC M/L VAN - 2000 to 2005 GMC SAFARI - 2000 GMC SAFARI \(GMC\) - 2000 to 2021 GMC SAVANA - 2014 GMC SIERRA 1500 - 2019 to 2021 GMC SIERRA 1500 - 2007 to 2021 GMC SIERRA 2500 - 2003 GMC SIERRA DENALI - 2007 to 2013 GMC SIERRA DENALI - 2015 to 2019 GMC SIERRA DENALI - 2000 to 2004 GMC SONOMA - 2000 GMC SUBURBAN - 2001 GMC SUBURBAN - 2010 to 2021 GMC TERRAIN - 2003 to 2010 GMC TOPKICK - 2004 to 2010 GMC W\-SERIES - 2000 to 2021 GMC YUKON - 2000 to 2013 GMC YUKON DENALI - 2004 to 2013 GMC YUKON DENALI XL - 2000 to 2011 GMC YUKON XL - 2012 to 2014 GMC YUKON XL - 2015 to 2021 GMC YUKON XL ## Recalls for the same vehicles and component - [21V421000](/recalls/nhtsa/21V421000.md), 2021-06-10: AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT; ELECTRICAL SYSTEM:SOFTWARE - [20V489000](/recalls/nhtsa/20V489000.md), 2020-08-18: ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE:BODY:TRUNK LID - [20V461000](/recalls/nhtsa/20V461000.md), 2020-08-06: ELECTRICAL SYSTEM:SOFTWARE; LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK - [2019463](/recalls/tc/2019463.md), 2019-09-19: Electrical - [19V642000](/recalls/nhtsa/19V642000.md), 2019-09-06: ENGINE; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS - [2016597](/recalls/tc/2016597.md), 2016-11-29: Electrical - [2016350](/recalls/tc/2016350.md), 2016-07-07: Electrical - [16V517000](/recalls/nhtsa/16V517000.md), 2016-07-07: SEATS:FRONT ASSEMBLY:POWER ADJUST; ELECTRICAL SYSTEM:WIRING - [16V502000](/recalls/nhtsa/16V502000.md), 2016-07-05: ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\) - [16V084000](/recalls/nhtsa/16V084000.md), 2016-02-11: ELECTRICAL SYSTEM:SOFTWARE ## Other bulletins for the same vehicles and component - [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\-119](/bulletins/11024331.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN. This service bulletin provides service procedure information to correct a customer concern of Shift to Park Displayed on DIC When Vehicle is in\- Park, No Start \- DTC B000A Set. - [18\-NA\-180](/bulletins/11024324.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information. - [18\-NA\-180](/bulletins/11023365.md), 2025-09-26, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information. - [24\-NA\-068](/bulletins/11019547.md), 2025-06-16, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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. - [24\-NA\-229](/bulletins/11019017.md), 2025-06-03, Service bulletin: ELECTRICAL SYSTEM. This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system that may be causing a drain. - [18\-NA\-069](/bulletins/11017876.md), 2025-05-06, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a service procedure to correct conditions of Poor Engine Performance in Extremely cold weather conditions, CAC Icing, MIL Illuminated with DTCs set. - [25\-NA\-087](/bulletins/11017595.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs. - [23\-NA\-074](/bulletins/11017508.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES; ENGINE; STEERING. This service bulletin provides a procedure to add deadener to the batter tray bracket to correct customer concerns of a Service Engine Soon \(SES\), Reduced Power, Service Brake, Reduced Steering and/or Stabilitrak Message Illuminated on DIC, multiple DTCs. - [21\-NA\-139](/bulletins/11017443.md), 2025-05-01, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P3055 Set. 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