Cadillac Lyriq Service Bulletins

1,009 manufacturer communications on file.

• June 18, 2026•Document ID: 11034023

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6021C

  Date Added:

  June 22, 2026

  Manufacturer:

  CADILLAC

  Summary

  This Preliminary Information communicates that, under certain conditions, a MIL (Malfunction Indicator Lamp) illumination or a "Service High Voltage" message may display on the IPC (Instrument Panel Cluster), and the 12V battery may experience discharge.

  Associated Products (9)

  2026 Cadillac Celestiq2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2025 Cadillac Celestiq2025 Cadillac Lyriq2025 Cadillac Optiq2024 Cadillac Lyriq2023 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11034023-0001.pdf↗
• June 17, 2026•Document ID: 11034014

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6503B

  Date Added:

  June 22, 2026

  Manufacturer:

  GMC

  Summary

  This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.

  Associated Products (27)

  2026 Buick Enclave2026 Buick Envision2026 Cadillac CT52026 Chevrolet Equinox2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Terrain2026 GMC Yukon2026 GMC Yukon XL2025 Buick Enclave2025 Buick Envision2025 Cadillac CT52025 Cadillac Lyriq2025 Cadillac XT42025 Chevrolet Equinox2025 Chevrolet Tahoe2025 Chevrolet Traverse2025 GMC Acadia2025 GMC Terrain+ 7 more
  Associated Documents

  • DownloadMC-11034014-0001.pdf↗
• June 16, 2026•Document ID: 11034038

  Over The Air
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N25-252332

  Date Added:

  June 24, 2026

  Manufacturer:

  GMC

  Summary

  • Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation, and Super Cruise.

  Associated Products (25)

  2026 Buick Enclave2026 Buick Envision2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Lyriq2026 Cadillac Optiq2026 Chevrolet Equinox2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Terrain2025 Buick Enclave2025 Cadillac Celestiq2025 Cadillac CT42025 Cadillac CT52025 Cadillac Lyriq2025 Cadillac Optiq2025 Chevrolet Traverse2025 GMC Acadia2024 Cadillac Lyriq+ 5 more
  Associated Documents

  • DownloadMC-11034038-0001.pdf↗
• June 12, 2026•Document ID: 11033999

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6103C

  Date Added:

  June 18, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

  Associated Products (6)

  2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2025 Cadillac Lyriq2025 Cadillac Optiq2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11033999-0001.pdf↗
• June 5, 2026•Document ID: 11033752

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6426B

  Date Added:

  June 8, 2026

  Manufacturer:

  CADILLAC

  Summary

  Fog lamp control may be missing from radio display after a BCM update. Engineering is investigating.

  Associated Products (29)

  2026 Buick Enclave2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Vistiq2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Yukon2026 GMC Yukon XL2025 Buick Enclave2025 Cadillac Celestiq2025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq+ 9 more
  Associated Documents

  • DownloadMC-11033752-0001.pdf↗
• June 3, 2026•Document ID: 11033726

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6503A

  Date Added:

  June 8, 2026

  Manufacturer:

  CHEVROLET

  Summary

  This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.

  Associated Products (101)

  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+ 81 more
  Associated Documents

  • DownloadMC-11033726-0001.pdf↗
• June 3, 2026•Document ID: 11033007

  Over The Air
  EXTERIOR LIGHTING; UNKNOWN OR OTHER

  Mfr Comm. #:

  661.50

  Date Added:

  May 29, 2026

  Manufacturer:

  CADILLAC

  Summary

  • The Ambient Lighting feature will now save your selection instead of resetting to white after each drive. • The active cabin ventilation feature will operate more reliably. • Additional protection for the health of your battery and updates to help prevent excessive battery drain and overheating. • Improvements will support successful software updates for your vehicle and allow you to access new features and fixes.

  Associated Products (1)

  2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11033007-0001.pdf↗
• May 27, 2026•Document ID: 11033150

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6519

  Date Added:

  June 2, 2026

  Manufacturer:

  GMC

  Summary

  This preliminary information is to inform technicians and customers that the voice command will be inoperative when trying to open applications. Engineering is investigating and this PI will be converted to a bulletin when a repair is available.

  Associated Products (152)

  2026 Buick Enclave2026 Buick Encore2026 Buick Encore GX2026 Buick Envision2026 Cadillac Celestiq2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac XT42026 Cadillac XT52026 Cadillac XT62026 Chevrolet Blazer2026 Chevrolet Colorado2026 Chevrolet Equinox2026 Chevrolet Express+ 132 more
  Associated Documents

  • DownloadMC-11033150-0001.pdf↗
• May 27, 2026•Document ID: 11033006

  Over The Air
  FUEL/PROPULSION SYSTEM; UNKNOWN OR OTHER

  Mfr Comm. #:

  661.40

  Date Added:

  May 29, 2026

  Manufacturer:

  CADILLAC

  Summary

  • Improvements to diagnostics and service messaging for battery health, particularly in humid conditions. • Improvements to transmission diagnostics used for shifting. • Improvements to charging system diagnostics. • Fixes to help protect EV adapter from overheating while charging. • Reduces unnecessary service messages, check engine light activations, and OnStar calls from your vehicle.

  Associated Products (4)

  2026 Cadillac Lyriq2025 Cadillac Lyriq2024 Cadillac Lyriq2023 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11033006-0001.pdf↗
• May 27, 2026•Document ID: 11032936

  Service Campaign
  UNKNOWN OR OTHER

  Mfr Comm. #:

  N262547330

  Date Added:

  May 27, 2026

  Manufacturer:

  CHEVROLET

  Summary

  Certain vehicles may have a condition in which the Telematic Control Module may enter an unrecoverable state. Dealers are to reprogram the Telematic Control Module. IMPORTANT: The module may be several software versions behind and could take multiple programming events to bring it to the latest software level (The same calibration screen MUST be displayed to validate the module has been programmed to the latest level). Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates.

  Associated Products (21)

  2026 Buick Enclave2026 Cadillac CT52026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Equinox2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Terrain2025 Buick Enclave2025 Cadillac Celestiq2025 Cadillac CT52025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT42025 Chevrolet Equinox2025 Chevrolet Traverse2025 GMC Acadia2025 GMC Terrain2024 Cadillac Lyriq+ 1 more
  Associated Documents

  • DownloadMC-11032936-0001.pdf↗
• May 22, 2026•Document ID: 11032961

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6639B

  Date Added:

  May 28, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI details a possible issue with the heads up display being inop, due to a possible software anomaly.

  Associated Products (2)

  2026 Cadillac Lyriq2026 Cadillac Vistiq
  Associated Documents

  • DownloadMC-11032961-0001.pdf↗
• May 22, 2026•Document ID: 11032960

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6426A

  Date Added:

  May 28, 2026

  Manufacturer:

  CADILLAC

  Summary

  If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.

  Associated Products (29)

  2026 Buick Enclave2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Vistiq2026 Chevrolet Tahoe2026 Chevrolet Traverse2026 GMC Acadia2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Yukon2026 GMC Yukon XL2025 Buick Enclave2025 Cadillac Celestiq2025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq+ 9 more
  Associated Documents

  • DownloadMC-11032960-0001.pdf↗
• May 21, 2026•Document ID: 11032956

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6652

  Date Added:

  May 28, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI Communicates that a grind noise maybe heard if the spring plate is not transferred to the new sunroof/shade motor.

  Associated Products (4)

  2026 Cadillac Lyriq2025 Cadillac Lyriq2024 Cadillac Lyriq2023 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11032956-0001.pdf↗
• May 21, 2026•Document ID: 11032952

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6215C

  Date Added:

  May 28, 2026

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary information communicates to dealership technicians that if they encounter a customer vehicle with this concern, to perform the steps listed and should be able to reprogram the module and correct this.

  Associated Products (53)

  2026 Cadillac CT42026 Cadillac CT52026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Escalade IQL2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Colorado2026 Chevrolet Equinox2026 Chevrolet Tahoe2026 GMC Canyon2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Terrain2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac CT42025 Cadillac CT5+ 33 more
  Associated Documents

  • DownloadMC-11032952-0001.pdf↗
• May 15, 2026•Document ID: 11032786

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6103B

  Date Added:

  May 19, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

  Associated Products (9)

  2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2026 Chevrolet Blazer2025 Cadillac Lyriq2025 Cadillac Optiq2025 Chevrolet Blazer2024 Cadillac Lyriq2024 Chevrolet Blazer
  Associated Documents

  • DownloadMC-11032786-0001.pdf↗
• May 14, 2026•Document ID: 11032784

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6540J

  Date Added:

  May 19, 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-11032784-0001.pdf↗
• May 14, 2026•Document ID: 11032782

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIC6651

  Date Added:

  May 19, 2026

  Manufacturer:

  CADILLAC

  Summary

  This preliminary information is to inform technicians and customers to not replace anything at this time and engineering is investigating the OTA concern that caused this.

  Associated Products (1)

  2026 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11032782-0001.pdf↗
• May 14, 2026•Document ID: 11032781

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6393L

  Date Added:

  May 19, 2026

  Manufacturer:

  CHEVROLET

  Summary

  This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.

  Associated Products (43)

  2026 Buick Enclave2026 Buick Envision2026 Cadillac CT52026 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 Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Terrain2026 GMC Yukon XL+ 23 more
  Associated Documents

  • DownloadMC-11032781-0001.pdf↗
• May 11, 2026•Document ID: 11032769

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIP6103A

  Date Added:

  May 19, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI explains that the T18, Battery charger drive power distribution control modules are on parts restriction thru TAC.

  Associated Products (6)

  2026 Cadillac Lyriq2026 Cadillac Optiq2026 Cadillac Vistiq2025 Cadillac Lyriq2025 Cadillac Optiq2024 Cadillac Lyriq
  Associated Documents

  • DownloadMC-11032769-0001.pdf↗
• May 11, 2026•Document ID: 11032768

  Service Bulletin/Repair Instructions
  UNKNOWN OR OTHER

  Mfr Comm. #:

  PIT6512

  Date Added:

  May 19, 2026

  Manufacturer:

  CADILLAC

  Summary

  This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.

  Associated Products (35)

  2026 Cadillac CT52026 Chevrolet Equinox2026 Chevrolet Traverse2026 GMC Terrain2025 Buick Enclave2025 Buick Envision2025 Cadillac CT52025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT42025 Chevrolet Colorado2025 Chevrolet Corvette2025 Chevrolet Equinox2025 Chevrolet Traverse2025 GMC Acadia2025 GMC Canyon2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Terrain+ 15 more
  Associated Documents

  • DownloadMC-11032768-0001.pdf↗