Chevrolet Silverado Service Bulletins

10,441 manufacturer communications on file.

• December 10, 2025•Document ID: 11026848

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.10

  Date Added:

  December 25, 2025

  Manufacturer:

  GMC

  Summary

  This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates.​​ • Improvements to help reduce check engine light activation and emissions system messages. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (2)

  2026 Chevrolet Silverado2026 GMC Sierra
  Associated Documents

  • DownloadMC-11026848-0001.pdf↗
• December 10, 2025•Document ID: 11026847

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.10

  Date Added:

  December 25, 2025

  Manufacturer:

  CHEVROLET

  Summary

  • Improvements to audio system performance. • Fixes to help ensure proper functionality for the center display. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (2)

  2023 Chevrolet Silverado2023 GMC Sierra
  Associated Documents

  • DownloadMC-11026847-0001.pdf↗
• December 10, 2025•Document ID: 11026846

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.20

  Date Added:

  December 25, 2025

  Manufacturer:

  CHEVROLET

  Summary

  • Improvements to audio system performance. ​​• Fixes to help ensure proper functionality for the center display. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (4)

  2026 Chevrolet Silverado2026 GMC Sierra2024 Chevrolet Silverado2024 GMC Sierra
  Associated Documents

  • DownloadMC-11026846-0001.pdf↗
• December 8, 2025•Document ID: 11026603

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6464

  Date Added:

  December 15, 2025

  Manufacturer:

  GMC

  Summary

  This PI communicates information that the customers fifth wheel hitch may not latch into the factory box mounted hitch due to a supplier quality concern. Dealer is to replace box mounted hitch to correct.

  Associated Products (4)

  2025 Chevrolet Silverado2025 GMC Sierra2024 Chevrolet Silverado2024 GMC Sierra
  Associated Documents

  • DownloadMC-11026603-0001.pdf↗
• December 5, 2025•Document ID: 11026843

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.30

  Date Added:

  December 25, 2025

  Manufacturer:

  GMC

  Summary

  • Fixes to help ensure proper functionality for transmission system. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (2)

  2026 Chevrolet Silverado2026 GMC Sierra
  Associated Documents

  • DownloadMC-11026843-0001.pdf↗
• December 5, 2025•Document ID: 11026496

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6393G

  Date Added:

  December 8, 2025

  Manufacturer:

  BUICK

  Summary

  This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it. It also informs them to follow the bulletins as necessary to USB update the modules.

  Associated Products (44)

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  Associated Documents

  • DownloadMC-11026496-0001.pdf↗
• December 4, 2025•Document ID: 11026492

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6224B

  Date Added:

  December 8, 2025

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates the Heavy Fuel Usage message in the DIC is normal due to low fuel range and current driving habits, or low fuel range and vehicle is idling.

  Associated Products (32)

  2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Chevrolet Silverado2025 Chevrolet Suburban2025 Chevrolet Tahoe2025 GMC Sierra2025 GMC Yukon2025 GMC Yukon XL2024 Cadillac Escalade2024 Cadillac Escalade ESV2024 Chevrolet Silverado2024 Chevrolet Suburban+ 12 more
  Associated Documents

  • DownloadMC-11026492-0001.pdf↗
• December 3, 2025•Document ID: 11026842

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N25-250552

  Date Added:

  December 24, 2025

  Manufacturer:

  GMC

  Summary

  Improvements to OnStar functionality. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.

  Associated Products (68)

  2026 Buick Encore2026 Buick Encore GX2025 Buick Encore2025 Buick Encore GX2025 Buick Envista2025 Cadillac XT52025 Cadillac XT62025 Chevrolet Blazer2025 Chevrolet Malibu2025 Chevrolet Trailblazer2025 Chevrolet Trax2024 Buick Enclave2024 Buick Encore2024 Buick Encore GX2024 Buick Envista2024 Cadillac XT52024 Cadillac XT62024 Chevrolet Blazer2024 Chevrolet Camaro2024 Chevrolet Equinox+ 48 more
  Associated Documents

  • DownloadMC-11026842-0001.pdf↗
• December 2, 2025•Document ID: 11026489

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6602Q

  Date Added:

  December 8, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.

  Associated Products (31)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 BrightDrop Zevo2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe+ 11 more
  Associated Documents

  • DownloadMC-11026489-0001.pdf↗
• December 2, 2025•Document ID: 11026488

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6630A

  Date Added:

  December 8, 2025

  Manufacturer:

  GMC

  Summary

  This Preliminary information communicates to dealers steps to follow to recover an IOK radio.

  Associated Products (24)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Corvette2025 Chevrolet Silverado2025 GMC Sierra2024 Chevrolet Corvette2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe2023 GMC Sierra2023 GMC Yukon2023 GMC Yukon XL2022 Chevrolet Silverado2022 Chevrolet Suburban+ 4 more
  Associated Documents

  • DownloadMC-11026488-0001.pdf↗
• November 26, 2025•Document ID: 11026073

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6461

  Date Added:

  December 3, 2025

  Manufacturer:

  CHEVROLET

  Summary

  PI addresses a software issue on the K5 Assist step control module and identifies that a software update will be released to resolve the issue.

  Associated Products (2)

  2026 Chevrolet Silverado2025 Chevrolet Silverado
  Associated Documents

  • DownloadMC-11026073-0001.pdf↗
• November 26, 2025•Document ID: 11026071

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6132D

  Date Added:

  December 3, 2025

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.

  Associated Products (48)

  2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Chevrolet Silverado2025 Chevrolet Suburban2025 Chevrolet Tahoe2025 GMC Sierra2025 GMC Yukon2025 GMC Yukon XL2024 Cadillac Escalade2024 Cadillac Escalade ESV2024 Chevrolet Silverado2024 Chevrolet Suburban+ 28 more
  Associated Documents

  • DownloadMC-11026071-0001.pdf↗
• November 26, 2025•Document ID: 11026069

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6459

  Date Added:

  December 3, 2025

  Manufacturer:

  CADILLAC

  Summary

  This PI communicates an issue where the Brake System Control Module DTC: U0028-88 and U0037-88 diagnostics are backwards and follow the diagnostic procedure for U0037 if U0028 is set and vice versa.

  Associated Products (8)

  2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL
  Associated Documents

  • DownloadMC-11026069-0001.pdf↗
• November 26, 2025•Document ID: 11026068

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6630

  Date Added:

  December 3, 2025

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers steps to follow to recover an IOK radio.

  Associated Products (22)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Silverado2025 GMC Sierra2024 Chevrolet Silverado2024 Chevrolet Suburban2024 Chevrolet Tahoe2024 GMC Sierra2024 GMC Yukon2024 GMC Yukon XL2023 Chevrolet Silverado2023 Chevrolet Suburban2023 Chevrolet Tahoe2023 GMC Sierra2023 GMC Yukon2023 GMC Yukon XL2022 Chevrolet Silverado2022 Chevrolet Suburban2022 Chevrolet Tahoe2022 GMC Sierra+ 2 more
  Associated Documents

  • DownloadMC-11026068-0001.pdf↗
• November 25, 2025•Document ID: 11026062

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6457

  Date Added:

  December 3, 2025

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.

  Associated Products (152)

  2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer2026 Chevrolet BrightDrop+ 132 more
  Associated Documents

  • DownloadMC-11026062-0001.pdf↗
• November 24, 2025•Document ID: 11025665

  Emissions
  FUEL/PROPULSION SYSTEM

  Mfr Comm. #:

  N242438500-04

  Date Added:

  November 24, 2025

  Manufacturer:

  GMC

  Summary

  Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2024 Model Year Chevrolet Silverado and GMC Sierra vehicles with a 6.6L diesel engine. The Engine Control Module (ECM) may not properly diagnose, may not set Diagnostic Trouble Codes (DTCs), or may not illuminate the Malfunction Indicator Light (Check Engine Light) if certain fault conditions of the Selective Catalyst Reduction (SCR or NOx) catalyst occur. Dealers are to reprogram the ECM and TCM.

  Associated Products (2)

  2024 Chevrolet Silverado2024 GMC Sierra
  Associated Documents

  • DownloadMC-11025665-0001.pdf↗
• November 24, 2025•Document ID: 11026067

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6456

  Date Added:

  December 3, 2025

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.

  Associated Products (51)

  2026 Buick Enclave2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Corvette2026 Chevrolet Silverado2026 Chevrolet Suburban2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Sierra2026 GMC Yukon2026 GMC Yukon XL2025 Buick Enclave2025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Lyriq2025 Cadillac Optiq+ 31 more
  Associated Documents

  • DownloadMC-11026067-0001.pdf↗
• November 20, 2025•Document ID: 11025752

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6455

  Date Added:

  November 28, 2025

  Manufacturer:

  GMC

  Summary

  This PI communications information that Engineering is investigating the Service Driver Assist message with current DTC B1B2F Telematics Control Module and U1624 Image Processing Control Module setting.

  Associated Products (4)

  2026 Chevrolet Silverado2026 GMC Sierra2025 Chevrolet Silverado2025 GMC Sierra
  Associated Documents

  • DownloadMC-11025752-0001.pdf↗
• November 20, 2025•Document ID: 11025652

  Service Campaign
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N252527780

  Date Added:

  November 20, 2025

  Manufacturer:

  CHEVROLET

  Summary

  Service Update. Certain vehicles listed above may have a condition in which the front object alarm sensor wire harness retention clip is not inserted in the front bumper bracket. Dealers will verify the harness clip is connected, and reseat if necessary.

  Associated Products (1)

  2026 Chevrolet Silverado
  Associated Documents

  • DownloadMC-11025652-0001.pdf↗
• November 20, 2025•Document ID: 11025755

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT5214G

  Date Added:

  November 28, 2025

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.

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  2027 Chevrolet Bolt EV2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Buick Envista2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer+ 716 more
  Associated Documents

  • DownloadMC-11025755-0001.pdf↗