Chevrolet Trailblazer Service Bulletins (2021)

754 manufacturer communications on file.

• October 27, 2020•Document ID: 10183198

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  20NA196

  Date Added:

  November 30, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This service bulletin provides information and a service procedure for dealers/technicians on OnStar Over the Air Update for TTY / TDD Operation and Continuous Improvement Changes.

  Associated Products (21)

  2021 Buick Encore2021 Buick Encore GX2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Equinox2021 Chevrolet Malibu2021 Chevrolet Spark2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer2021 Chevrolet Trax2021 GMC Canyon2021 GMC Terrain2021 GMC Yukon+ 1 more
  Associated Documents

  • DownloadMC-10183198-0001.pdf↗
• October 23, 2020•Document ID: 10183782

  Service Bulletin/Repair Instructions
  POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT; ELECTRICAL SYSTEM

  Mfr Comm. #:

  1308116001F

  Date Added:

  December 7, 2020

  Manufacturer:

  CADILLAC

  Summary

  The intent of this technical bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.

  Associated Products (28)

  2021 Buick Enclave2021 Buick Encore2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Bolt EV2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Express2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer+ 8 more
  Associated Documents

  • DownloadMC-10183782-0001.pdf↗
• October 23, 2020•Document ID: 10183126

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  16NA222

  Date Added:

  November 30, 2020

  Manufacturer:

  GMC

  Summary

  This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.

  Associated Products (25)

  2021 Buick Enclave2021 Buick Encore2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Express2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer2021 GMC Acadia+ 5 more
  Associated Documents

  • DownloadMC-10183126-0001.pdf↗
• October 22, 2020•Document ID: 10183208

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM:ADAS:HILL START ASSIST:SOFTWARE; POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

  Mfr Comm. #:

  20NA210

  Date Added:

  November 30, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This technical bulletin provides repair information to correct a customer concern of All-Wheel Drive Off and/or Service All-Wheel Drive System Messages Displayed in the DIC.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10183208-0001.pdf↗
• October 22, 2020•Document ID: 10182566

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  PIC6416A

  Date Added:

  November 16, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to the dealer that if the service AWD (All-Wheel Drive) or AWD (All-Wheel Drive) Off messages are on and there is a history DTC of C15C9 SYM02 set then no repairs are to be made at this time, a software issue was found and Engineering is working on a permanent solution. If the DTC is setting current then published diagnosis needs to be followed.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10182566-0001.pdf↗
• October 21, 2020•Document ID: 10183779

  Service Bulletin/Repair Instructions
  FUEL SYSTEM, DIESEL

  Mfr Comm. #:

  050604022R

  Date Added:

  December 7, 2020

  Manufacturer:

  GMC

  Summary

  This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.

  Associated Products (27)

  2021 Buick Enclave2021 Buick Encore2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Bolt EV2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Express2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer+ 7 more
  Associated Documents

  • DownloadMC-10183779-0001.pdf↗
• October 16, 2020•Document ID: 10182556

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  PIP5758

  Date Added:

  November 16, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to the dealer technician a diagnostic tip related to a tapping noise from the engine.

  Associated Products (2)

  2021 Buick Encore GX2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10182556-0001.pdf↗
• October 14, 2020•Document ID: 10182554

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  PIP5675F

  Date Added:

  November 16, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to the dealer that a customer may comment that the MIL light is illuminated. The technician may find P1098 and/or P26BB set current or history.  That this may be caused by a software anomaly, and that GM is currently looking into the issue. It provides testing and related direction based on the results.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10182554-0001.pdf↗
• October 9, 2020•Document ID: 10183780

  Service Bulletin/Repair Instructions
  EQUIPMENT

  Mfr Comm. #:

  060089026Q

  Date Added:

  December 7, 2020

  Manufacturer:

  CADILLAC

  Summary

  This warranty administration bulletin provides information on Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers.

  Associated Products (26)

  2021 Buick Enclave2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Bolt EV2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Express2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer2021 Chevrolet Traverse+ 6 more
  Associated Documents

  • DownloadMC-10183780-0001.pdf↗
• October 7, 2020•Document ID: 10183221

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

  Mfr Comm. #:

  A202317281 01

  Date Added:

  November 30, 2020

  Manufacturer:

  CHEVROLET

  Summary

  Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system requirements. Dealers are to inspect the catalytic converter and replace if the correct part was not installed.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10183221-0001.pdf↗
• October 6, 2020•Document ID: 10183791

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  PIE0587

  Date Added:

  December 7, 2020

  Manufacturer:

  BUICK

  Summary

  This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to loss of and/or reduced propulsion and multiple DTCs set.

  Associated Products (3)

  2021 Buick Encore GX2021 Chevrolet Malibu2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10183791-0001.pdf↗
• October 2, 2020•Document ID: 10183219

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

  Mfr Comm. #:

  A202317281

  Date Added:

  November 30, 2020

  Manufacturer:

  CHEVROLET

  Summary

  Emission Recall - General Motors has decided to conduct a voluntary emission recall on certain vehicles with a 1.2L engine (RPO LIH). These vehicles may have received incorrect catalytic converter parts that do not meet all emission system requirements. Dealers are to inspect the catalytic converter.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10183219-0001.pdf↗
• September 30, 2020•Document ID: 10181724

  Service Bulletin/Repair Instructions
  EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

  Mfr Comm. #:

  110089005P

  Date Added:

  October 26, 2020

  Manufacturer:

  GMC

  Summary

  This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).

  Associated Products (25)

  2021 Buick Enclave2021 Buick Encore2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Express2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer2021 GMC Acadia+ 5 more
  Associated Documents

  • DownloadMC-10181724-0001.pdf↗
• September 29, 2020•Document ID: 10181686

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  20NA028

  Date Added:

  October 26, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This bulletin is to inform dealers that in extreme cold weather, a grille winter cover needs be added during PDI to avoid the customer returning with concerns related to charge air cooler icing.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181686-0001.pdf↗
• September 29, 2020•Document ID: 10181675

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY; EQUIPMENT

  Mfr Comm. #:

  18NA306

  Date Added:

  October 26, 2020

  Manufacturer:

  GMC

  Summary

  This Warranty Administration bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA) (US dealers only).

  Associated Products (24)

  2021 Buick Enclave2021 Buick Encore2021 Buick Encore GX2021 Buick Envision2021 Cadillac CT42021 Cadillac CT52021 Cadillac XT42021 Cadillac XT52021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Equinox2021 Chevrolet Malibu2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Trailblazer2021 GMC Acadia2021 GMC Canyon+ 4 more
  Associated Documents

  • DownloadMC-10181675-0001.pdf↗
• September 29, 2020•Document ID: 10181174

  Service Bulletin/Repair Instructions
  ENGINE

  Mfr Comm. #:

  PIP5692B

  Date Added:

  October 19, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code LIH has ended. This engine can now be ordered through the regular General Motors Customer Care and Aftersales parts process or Product Quality Center process for required dealers.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181174-0001.pdf↗
• September 23, 2020•Document ID: 10181691

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; STRUCTURE:BODY:HATCHBACK/LIFTGATE

  Mfr Comm. #:

  20NA135

  Date Added:

  October 26, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This technical bulletin provides repair information to correct customer concerns of Power Liftgate and/or Instrument Panel Cluster (IPC) Inoperative, No Audio, AWD/ 2WD Light Toggles Randomly, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0650, P15A1, P159F-00, U0184-00, U0198-00 and/or U1501-00 Set.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181691-0001.pdf↗
• September 21, 2020•Document ID: 10181656

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  A202310450

  Date Added:

  October 26, 2020

  Manufacturer:

  BUICK

  Summary

  Service Update - Certain vehicles may have condition that a MIL illuminates on the dash and technicians may find one or more following DTC(s) sets: P2B95, P2B08, P2B09, P2B0A, P2B96, P2B00, P2B01, or P2B02. Dealers are required to reprogram the engine control module.

  Associated Products (2)

  2021 Buick Encore GX2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181656-0001.pdf↗
• September 21, 2020•Document ID: 10181153

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  PIP5691B

  Date Added:

  October 19, 2020

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary Information communication advises the technician that the engine exchange program on vehicles equipped with engine Regular Production Option Code L3T has ended. This engine can now be ordered through the regular General Motors Customer Care and Aftersales parts process or Product Quality Center process for required dealers.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181153-0001.pdf↗
• September 18, 2020•Document ID: 10181659

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  A202317280

  Date Added:

  October 26, 2020

  Manufacturer:

  CHEVROLET

  Summary

  Stop Delivery. Incorrect emission parts may have been installed on these vehicles.

  Associated Products (1)

  2021 Chevrolet Trailblazer
  Associated Documents

  • DownloadMC-10181659-0001.pdf↗