GMC Sierra Service Bulletins (2020)

1,991 manufacturer communications on file.

• December 22, 2020•Document ID: 10187409

  Service Bulletin/Repair Instructions
  STRUCTURE:BODY

  Mfr Comm. #:

  20NA175

  Date Added:

  February 22, 2021

  Manufacturer:

  CHEVROLET

  Summary

  This technical bulletin provides repair information to correct a customer concern of vertical misalignment between cab and pickup box on driver side of vehicle.

  Associated Products (6)

  2021 Chevrolet Silverado2021 GMC Sierra2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10187409-0001.pdf↗
• December 22, 2020•Document ID: 10187389

  Service Bulletin/Repair Instructions
  STRUCTURE

  Mfr Comm. #:

  19NA257

  Date Added:

  February 22, 2021

  Manufacturer:

  GMC

  Summary

  This technical bulletin provides repair information to correct a customer concern of the pickup box being out of alignment.

  Associated Products (6)

  2021 Chevrolet Silverado2021 GMC Sierra2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10187389-0001.pdf↗
• December 22, 2020•Document ID: 10187200

  Service Bulletin/Repair Instructions
  LANE DEPARTURE

  Mfr Comm. #:

  PIT5713A

  Date Added:

  February 16, 2021

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates an issue with the engine wiring harness shorting at the left front cylinder head causing any of the following issues: -  IPC gauges sweeping while driving -  Several IPC warning messages and MIL displayed -  Any combination of the following DTC's: U0073 U0100 U0101 U0121 U0128 U0129 U0131 U0140 U0146 U0422 U2413 P0107 P0117 P0119 P0641 C2A07

  Associated Products (4)

  2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10187200-0001.pdf↗
• December 22, 2020•Document ID: 10186082

  Service Bulletin/Repair Instructions
  STRUCTURE

  Mfr Comm. #:

  20NA175

  Date Added:

  February 1, 2021

  Manufacturer:

  CHEVROLET

  Summary

  This technical bulletin provides repair information to correct a customer concern of vertical misalignment between cab and pickup box on driver side of vehicle.

  Associated Products (6)

  2021 Chevrolet Silverado2021 GMC Sierra2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10186082-0001.pdf↗
• December 22, 2020•Document ID: 10186075

  Service Bulletin/Repair Instructions
  STRUCTURE; EQUIPMENT

  Mfr Comm. #:

  19NA257

  Date Added:

  February 1, 2021

  Manufacturer:

  CHEVROLET

  Summary

  This technical bulletin provides repair information to correct a customer concern of the pickup box being out of alignment.

  Associated Products (6)

  2021 Chevrolet Silverado2021 GMC Sierra2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10186075-0001.pdf↗
• December 22, 2020•Document ID: 10185749

  Service Bulletin/Repair Instructions
  LANE DEPARTURE

  Mfr Comm. #:

  PIT5713A

  Date Added:

  January 25, 2021

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates an issue with the engine wiring harness shorting at the left front cylinder head causing any of the following issues: -  IPC gauges sweeping while driving -  Several IPC warning messages and MIL displayed -  Any combination of the following DTC's: U0073 U0100 U0101 U0121 U0128 U0129 U0131 U0140 U0146 U0422 U2413 P0107 P0117 P0119 P0641 C2A07

  Associated Products (4)

  2020 Chevrolet Silverado2020 GMC Sierra2019 Chevrolet Silverado2019 GMC Sierra
  Associated Documents

  • DownloadMC-10185749-0001.pdf↗
• December 22, 2020•Document ID: 10187736

  Service Bulletin/Repair Instructions
  ENGINE; ELECTRICAL SYSTEM

  Mfr Comm. #:

  PIE0601A

  Date Added:

  March 1, 2021

  Manufacturer:

  CHEVROLET

  Summary

  This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon Lamp being illuminated.

  Associated Products (10)

  2021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Silverado2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Sierra2021 GMC Yukon2021 GMC Yukon XL2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187736-0001.pdf↗
• December 22, 2020•Document ID: 10186115

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; ENGINE

  Mfr Comm. #:

  PIE0601A

  Date Added:

  February 1, 2021

  Manufacturer:

  CADILLAC

  Summary

  This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon Lamp being illuminated.

  Associated Products (10)

  2021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Silverado2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Sierra2021 GMC Yukon2021 GMC Yukon XL2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10186115-0001.pdf↗
• December 21, 2020•Document ID: 10187622

  Service Bulletin/Repair Instructions
  EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SEAT BELTS

  Mfr Comm. #:

  N202316160

  Date Added:

  March 1, 2021

  Manufacturer:

  GMC

  Summary

  Service Update - Certain 2020 model year Chevrolet Silverado 1500/2500 and GMC Sierra 1500/2500 vehicles may have a condition where the driver side front outboard seat belt may not retract due to a broken rewind spring. If the seat belt is loose, the effectiveness of the restraints may be reduced. The retractor will still pretension and lock during a crash. Replace the seat belt retractor.

  Associated Products (2)

  2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187622-0001.pdf↗
• December 21, 2020•Document ID: 10187369

  Service Bulletin/Repair Instructions
  SEAT BELTS

  Mfr Comm. #:

  N202316160

  Date Added:

  February 22, 2021

  Manufacturer:

  GMC

  Summary

  Service Update - Certain 2020 model year Chevrolet Silverado 1500/2500 and GMC Sierra 1500/2500 vehicles may have a condition where the driver side front outboard seat belt may not retract due to a broken rewind spring. If the seat belt is loose, the effectiveness of the restraints may be reduced. The retractor will still pretension and lock during a crash. Replace the seat belt retractor.

  Associated Products (2)

  2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187369-0001.pdf↗
• December 21, 2020•Document ID: 10187217

  Service Bulletin/Repair Instructions
  SEAT BELTS; AIR BAGS

  Mfr Comm. #:

  N202316160

  Date Added:

  February 16, 2021

  Manufacturer:

  CHEVROLET

  Summary

  Service Update - Certain 2020 model year Chevrolet Silverado 1500/2500 and GMC Sierra 1500/2500 vehicles may have a condition where the driver side front outboard seat belt may not retract due to a broken rewind spring. If the seat belt is loose, the effectiveness of the restraints may be reduced. The retractor will still pretension and lock during a crash. Replace the seat belt retractor.

  Associated Products (2)

  2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187217-0001.pdf↗
• December 21, 2020•Document ID: 10186055

  Service Bulletin/Repair Instructions
  SEAT BELTS; EQUIPMENT

  Mfr Comm. #:

  N202316160

  Date Added:

  February 1, 2021

  Manufacturer:

  CHEVROLET

  Summary

  Service Update - Certain 2020 model year Chevrolet Silverado 1500/2500 and GMC Sierra 1500/2500 vehicles may have a condition where the driver side front outboard seat belt may not retract due to a broken rewind spring. If the seat belt is loose, the effectiveness of the restraints may be reduced. The retractor will still pretension and lock during a crash. Replace the seat belt retractor.

  Associated Products (2)

  2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10186055-0001.pdf↗
• December 18, 2020•Document ID: 10187413

  Service Bulletin/Repair Instructions
  EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE

  Mfr Comm. #:

  20NA218

  Date Added:

  February 22, 2021

  Manufacturer:

  CADILLAC

  Summary

  This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.

  Associated Products (8)

  2021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Yukon2021 GMC Yukon XL2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187413-0001.pdf↗
• December 18, 2020•Document ID: 10187196

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM

  Mfr Comm. #:

  PIT5799A

  Date Added:

  February 16, 2021

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates a cocnern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.

  Associated Products (20)

  2021 Cadillac CT42021 Cadillac CT52021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Corvette2021 Chevrolet Silverado2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Sierra2021 GMC Yukon2020 Cadillac CT52020 Cadillac Escalade2020 Cadillac Escalade ESV2020 Chevrolet Bolt EV2020 Chevrolet Corvette2020 Chevrolet Silverado2020 Chevrolet Suburban2020 Chevrolet Tahoe2020 GMC Sierra2020 GMC Yukon
  Associated Documents

  • DownloadMC-10187196-0001.pdf↗
• December 18, 2020•Document ID: 10186086

  Service Bulletin/Repair Instructions
  ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE; ENGINE AND ENGINE COOLING

  Mfr Comm. #:

  20NA218

  Date Added:

  February 1, 2021

  Manufacturer:

  CADILLAC

  Summary

  This technical bulletin provides repair information to correct a customer concern of Possible Crank No Start or Extended Crank with DTC P12A6.

  Associated Products (8)

  2021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Yukon2021 GMC Yukon XL2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10186086-0001.pdf↗
• December 18, 2020•Document ID: 10185745

  Service Bulletin/Repair Instructions
  EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.

  Mfr Comm. #:

  PIT5799A

  Date Added:

  January 25, 2021

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates a cocnern where a flashing spot can intermittently show up on the radio display while in reverse. The PI advises that engineering is investigating the concern.

  Associated Products (20)

  2021 Cadillac CT42021 Cadillac CT52021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Chevrolet Corvette2021 Chevrolet Silverado2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 GMC Sierra2021 GMC Yukon2020 Cadillac CT52020 Cadillac Escalade2020 Cadillac Escalade ESV2020 Chevrolet Bolt EV2020 Chevrolet Corvette2020 Chevrolet Silverado2020 Chevrolet Suburban2020 Chevrolet Tahoe2020 GMC Sierra2020 GMC Yukon
  Associated Documents

  • DownloadMC-10185745-0001.pdf↗
• December 17, 2020•Document ID: 10187731

  Service Bulletin/Repair Instructions
  ELECTRICAL SYSTEM; ENGINE

  Mfr Comm. #:

  PIE0578C

  Date Added:

  March 1, 2021

  Manufacturer:

  GMC

  Summary

  This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Slow Start and/or No Start, Battery Message Indicated, having to jump start on more then one occasion.

  Associated Products (1)

  2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187731-0001.pdf↗
• December 17, 2020•Document ID: 10186110

  Service Bulletin/Repair Instructions
  EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE

  Mfr Comm. #:

  PIE0578C

  Date Added:

  February 1, 2021

  Manufacturer:

  GMC

  Summary

  This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a Slow Start and/or No Start, Battery Message Indicated, having to jump start on more then one occasion.

  Associated Products (1)

  2020 GMC Sierra
  Associated Documents

  • DownloadMC-10186110-0001.pdf↗
• December 17, 2020•Document ID: 10187619

  Service Bulletin/Repair Instructions
  STEERING; EQUIPMENT

  Mfr Comm. #:

  N202315380

  Date Added:

  March 1, 2021

  Manufacturer:

  CHEVROLET

  Summary

  Service Update. A small number of vehicles may have been built with a cracked steering gear ballnut which could result in noise and reduction of steering performance. Dealers are to replace the steering gear.

  Associated Products (4)

  2021 Chevrolet Suburban2021 Chevrolet Tahoe2020 Chevrolet Silverado2020 GMC Sierra
  Associated Documents

  • DownloadMC-10187619-0001.pdf↗
• December 17, 2020•Document ID: 10187428

  Service Bulletin/Repair Instructions
  EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS

  Mfr Comm. #:

  20NA235

  Date Added:

  February 22, 2021

  Manufacturer:

  CADILLAC

  Summary

  This service bulletin provides information to aid a dealer/customer concern of Radio Unwanted Phantom Touch or Non-Responsive to Touch After Cleaning/Disinfecting Radio Display.

  Associated Products (58)

  2021 Buick Enclave2021 Buick Encore GX2021 Cadillac CT42021 Cadillac CT52021 Cadillac CT62021 Cadillac Escalade2021 Cadillac Escalade ESV2021 Cadillac XT42021 Cadillac XT62021 Chevrolet Blazer2021 Chevrolet Bolt EV2021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Corvette2021 Chevrolet Malibu2021 Chevrolet Silverado2021 Chevrolet Suburban2021 Chevrolet Tahoe2021 Chevrolet Traverse2021 GMC Acadia+ 38 more
  Associated Documents

  • DownloadMC-10187428-0001.pdf↗