Cadillac Lyriq Service Bulletins

1,009 manufacturer communications on file.

• January 20, 2026•Document ID: 11027888

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6099

  Date Added:

  January 30, 2026

  Manufacturer:

  GMC

  Summary

  This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a TCM data pull.

  Associated Products (14)

  2026 Buick Enclave2026 Buick Envision2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Equinox2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Terrain2026 GMC Yukon2026 GMC Yukon XL
  Associated Documents

  • DownloadMC-11027888-0001.pdf↗
• January 20, 2026•Document ID: 11027877

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6456A

  Date Added:

  January 30, 2026

  Manufacturer:

  CHEVROLET

  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 (37)

  2026 Buick Enclave2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Equinox2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Yukon2026 GMC Yukon XL2025 Buick Enclave2025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Lyriq2025 Cadillac Optiq2025 Chevrolet Corvette2025 Chevrolet Equinox2025 Chevrolet Tahoe2025 Chevrolet Traverse+ 17 more
  Associated Documents

  • DownloadMC-11027877-0001.pdf↗
• January 16, 2026•Document ID: 11027911

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.50

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  • Fixes for active cabin ventilation. • Fixes to help ensure proper functionality for heating and cooling features. • Improvements to night mode lights for shifting gears. • Fixes for Daytime Running Lamps turning on when set to Off. • Improvements to the performance of electric vehicle sound enhancement. • Fixes to help prevent loss of functionality for Dolby Atmos. • Fixes to ensure proper audio options display in menu. •Fixes to help ensure accurate driver display messages and alerts.

  Associated Products (1)

  2026 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027911-0001.pdf↗
• January 16, 2026•Document ID: 11027910

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.60

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  • Fixes to help ensure successful vehicle software updates. • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features. • Fixes for active cabin ventilation. • Fixes to help ensure proper functionality for heating and cooling features. • Improvements to night mode lights for shifting gears. • Fixes for Daytime Running Lamps turning on when set to Off. • Fixes to help prevent erroneous missing key messages on driver display. • Fixes for accuracy of low tire pressure alert. • Fixes for speed threshold for pedestrian alerts.

  Associated Products (2)

  2025 Cadillac Lyriq2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027910-0001.pdf↗
• January 16, 2026•Document ID: 11027909

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.20

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  • Fixes to help ensure successful vehicle software updates. • Improvements to the performance of Automatic Emergency Braking and Adaptive Cruise Control braking. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features. • Improvements to the performance of electric vehicle sound enhancement. • Fixes to help prevent loss of functionality for Dolby Atmos. • Fixes to ensure proper audio options display in menu. • Fixes to help ensure proper traction control activation.

  Associated Products (1)

  2023 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027909-0001.pdf↗
• January 16, 2026•Document ID: 11027908

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.30

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  •Improvements to help protect battery health in low temperatures. •Improvements to diagnostics to reduce service messages. •Fixes to help protect battery health in high temperatures. •Fixes to improve responsiveness for vehicle diagnostics.

  Associated Products (1)

  2026 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027908-0001.pdf↗
• January 16, 2026•Document ID: 11027907

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.40

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  •Improvements to help protect battery health in low temperatures. •Improvements to diagnostics to reduce service messages. •Fixes to help protect battery health in high temperatures. •Fixes to improve responsiveness for vehicle diagnostics.

  Associated Products (2)

  2025 Cadillac Lyriq2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027907-0001.pdf↗
• January 16, 2026•Document ID: 11027906

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.10

  Date Added:

  February 1, 2026

  Manufacturer:

  CADILLAC

  Summary

  •Improvements to help protect battery health in low temperatures. •Improvements to diagnostics to reduce service messages. •Fixes to help protect battery health in high temperatures. •Fixes to improve responsiveness for vehicle diagnostics.

  Associated Products (1)

  2023 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11027906-0001.pdf↗
• January 16, 2026•Document ID: 11027697

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6425C

  Date Added:

  January 19, 2026

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

  Associated Products (210)

  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 Colorado+ 190 more
  Associated Documents

  • DownloadMC-11027697-0001.pdf↗
• January 14, 2026•Document ID: 11027701

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6098

  Date Added:

  January 19, 2026

  Manufacturer:

  CHEVROLET

  Summary

  This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.

  Associated Products (210)

  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 Colorado+ 190 more
  Associated Documents

  • DownloadMC-11027701-0001.pdf↗
• January 12, 2026•Document ID: 11027686

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6457B

  Date Added:

  January 19, 2026

  Manufacturer:

  CHEVROLET

  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 (136)

  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 Colorado+ 116 more
  Associated Documents

  • DownloadMC-11027686-0001.pdf↗
• January 10, 2026•Document ID: 11027614

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6566B

  Date Added:

  January 14, 2026

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.

  Associated Products (21)

  2026 Buick Encore GX2026 Cadillac CT42026 Cadillac Lyriq2026 Chevrolet Colorado2026 GMC Canyon2025 Buick Encore GX2025 Cadillac CT42025 Cadillac Lyriq2025 Cadillac XT42025 Chevrolet Colorado2025 GMC Canyon2024 Buick Encore GX2024 Cadillac CT42024 Cadillac Lyriq2024 Cadillac XT42024 Chevrolet Colorado2024 GMC Canyon2023 Buick Encore GX2023 Cadillac CT42023 Chevrolet Colorado+ 1 more
  Associated Documents

  • DownloadMC-11027614-0001.pdf↗
• January 8, 2026•Document ID: 11027601

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP4902U

  Date Added:

  January 13, 2026

  Manufacturer:

  GMC

  Summary

  This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  Associated Products (210)

  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 Colorado+ 190 more
  Associated Documents

  • DownloadMC-11027601-0001.pdf↗
• December 31, 2025•Document ID: 11026923

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6540F

  Date Added:

  January 4, 2026

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealers a procedure to reset the radio.

  Associated Products (136)

  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 Colorado+ 116 more
  Associated Documents

  • DownloadMC-11026923-0001.pdf↗
• December 25, 2025•Document ID: 11026864

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6635B

  Date Added:

  December 29, 2025

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information is to inform technicians that GM is aware of this issue and engineering is currently investigating. Technicians are to not replace any parts at this time.

  Associated Products (1)

  2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11026864-0001.pdf↗
• December 23, 2025•Document ID: 11026861

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6393H

  Date Added:

  December 29, 2025

  Manufacturer:

  GMC

  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 (34)

  2026 Buick Enclave2026 Cadillac Vistiq2026 Chevrolet Equinox2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Terrain2025 Buick Enclave2025 Buick Envision2025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT42025 Chevrolet Colorado2025 Chevrolet Equinox2025 Chevrolet Tahoe+ 14 more
  Associated Documents

  • DownloadMC-11026861-0001.pdf↗
• December 19, 2025•Document ID: 11026854

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  654.20

  Date Added:

  December 25, 2025

  Manufacturer:

  CADILLAC

  Summary

  •This update will allow you to enable digital key with the myCadillac mobile app. •Digital key is a new feature that lets you lock, unlock, and start your vehicle using your smartphone or smartwatch. This feature allows for convenient vehicle access without a key fob. •For more information, refer to the Cadillac support site. •Digital key requires a compatible device and active OnStar service plan. See onstar.com for details and limitations. •Fixes for active cabin ventilation. •Fixes to help ensure your vehicle can recognize the key when using digital key. •Improvements to the performance of vehicle software updates. 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 (1)

  2026 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11026854-0001.pdf↗
• December 19, 2025•Document ID: 11026724

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6635A

  Date Added:

  December 22, 2025

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information is to inform technicians that GM is aware of this issue and engineering is currently investigating. Technicians are to not replace any parts at this time.

  Associated Products (1)

  2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11026724-0001.pdf↗
• December 19, 2025•Document ID: 11026727

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6445B

  Date Added:

  December 22, 2025

  Manufacturer:

  CADILLAC

  Summary

  This PI communicates information that the Collision / Detection Systems will revert to default setting of Alert and Brake after an Ignition Cycle due to an Engineering change.

  Associated Products (20)

  2026 Buick Enclave2026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Cadillac XT42026 Chevrolet Colorado2026 Chevrolet Equinox2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Canyon2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Terrain2026 GMC Yukon2026 GMC Yukon XL
  Associated Documents

  • DownloadMC-11026727-0001.pdf↗
• December 16, 2025•Document ID: 11026716

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6635

  Date Added:

  December 22, 2025

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information is to inform technicians that GM is aware of this issue and engineering is currently investigating. Technicians are to not replace any parts at this time.

  Associated Products (1)

  2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11026716-0001.pdf↗