Cadillac CT4 Service Bulletins (2022)
739 manufacturer communications on file.
- January 14, 2026•Document ID: 11027701Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP6098
- Date Added:
- January 19, 2026
- Manufacturer:
- CHEVROLET
SummaryThis 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 moreAssociated Documents - January 12, 2026•Document ID: 11027689Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5700G
- Date Added:
- January 19, 2026
- Manufacturer:
- CADILLAC
SummaryThis PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
Associated Products (16)2023 Cadillac CT42023 Chevrolet Camaro2023 Chevrolet Express2023 GMC Savana2022 Cadillac CT42022 Chevrolet Camaro2022 Chevrolet Colorado2022 Chevrolet Express2022 GMC Canyon2022 GMC Savana2021 Cadillac CT42021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Express2021 GMC Canyon2021 GMC SavanaAssociated Documents - January 10, 2026•Document ID: 11027617Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5841G
- Date Added:
- January 14, 2026
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
Associated Products (38)2025 Buick Envision2025 Cadillac CT42025 Cadillac CT52025 Cadillac XT42025 Cadillac XT52025 Cadillac XT62025 Chevrolet Blazer2024 Buick Envision2024 Cadillac CT42024 Cadillac CT52024 Cadillac XT42024 Cadillac XT52024 Cadillac XT62024 Chevrolet Blazer2023 Buick Envision2023 Cadillac CT42023 Cadillac CT52023 Cadillac XT42023 Cadillac XT52023 Cadillac XT6+ 18 moreAssociated Documents - January 10, 2026•Document ID: 11027615Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6369B
- Date Added:
- January 14, 2026
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
Associated Products (44)2026 Buick Encore2026 Cadillac CT42025 Buick Encore2025 Cadillac CT42025 Chevrolet Corvette2025 Chevrolet Tahoe2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2024 Buick Encore2024 Cadillac CT42024 Cadillac CT52024 Cadillac Escalade2024 Cadillac Escalade ESV2024 Chevrolet Corvette2024 Chevrolet Tahoe2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Yukon2024 GMC Yukon XL2023 Buick Encore+ 24 moreAssociated Documents - January 8, 2026•Document ID: 11027601Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP4902U
- Date Added:
- January 13, 2026
- Manufacturer:
- GMC
SummaryThis 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 moreAssociated Documents - December 17, 2025•Document ID: 11026720Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP6093
- Date Added:
- December 22, 2025
- Manufacturer:
- BUICK
SummaryThis Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
Associated Products (8)Associated Documents - December 17, 2025•Document ID: 11026721Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP6092A
- Date Added:
- December 22, 2025
- Manufacturer:
- CADILLAC
SummaryThis preliminary information advises dealers that Engine Control Module designation E01 is on a ordering restriction through technical assistance.
Associated Products (23)2026 Cadillac CT42026 Cadillac CT52026 Chevrolet Colorado2026 GMC Canyon2025 Buick Envision2025 Cadillac CT42025 Cadillac CT52025 Cadillac XT42025 Chevrolet Colorado2025 GMC Canyon2024 Buick Envision2024 Cadillac CT42024 Cadillac CT52024 Cadillac XT42024 Chevrolet Colorado2024 GMC Canyon2023 Buick Envision2023 Cadillac CT42023 Cadillac CT52023 Chevrolet Colorado+ 3 moreAssociated Documents - November 20, 2025•Document ID: 11025755Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT5214G
- Date Added:
- November 28, 2025
- Manufacturer:
- CADILLAC
SummaryThis 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.
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 moreAssociated Documents - November 7, 2025•Document ID: 11025462Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5865J
- Date Added:
- November 10, 2025
- Manufacturer:
- CHEVROLET
SummaryThis Preliminary information communicates the possibility of DTC P30BF failing on low mile vehicles due to the possibility of the cylinder 1/2 sliding barrel binding on intake camshaft.
Associated Products (14)Associated Documents - November 3, 2025•Document ID: 11025453Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6446
- Date Added:
- November 10, 2025
- Manufacturer:
- CHEVROLET
SummaryThis PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
Associated Products (48)2026 Cadillac CT42026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Chevrolet Tahoe2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac CT42025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Chevrolet Tahoe2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Yukon2025 GMC Yukon XL2024 Cadillac CT42024 Cadillac Escalade ESV+ 28 moreAssociated Documents - October 30, 2025•Document ID: 11024777Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5700F
- Date Added:
- November 3, 2025
- Manufacturer:
- CHEVROLET
SummaryThis PI communicates the proper part numbers for transmission connectors and internal harness to prevent confusion when ordering
Associated Products (16)2023 Cadillac CT42023 Chevrolet Camaro2023 Chevrolet Express2023 GMC Savana2022 Cadillac CT42022 Chevrolet Camaro2022 Chevrolet Colorado2022 Chevrolet Express2022 GMC Canyon2022 GMC Savana2021 Cadillac CT42021 Chevrolet Camaro2021 Chevrolet Colorado2021 Chevrolet Express2021 GMC Canyon2021 GMC SavanaAssociated Documents - October 29, 2025•Document ID: 11024768Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6446
- Date Added:
- November 3, 2025
- Manufacturer:
- CADILLAC
SummaryThis PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
Associated Products (54)2026 Cadillac CT42026 Cadillac Escalade2026 Cadillac Escalade ESV2026 Cadillac Escalade IQ2026 Cadillac Lyriq2026 Chevrolet Tahoe2026 GMC Hummer EV Pickup2026 GMC Hummer EV SUV2026 GMC Yukon2026 GMC Yukon XL2025 Cadillac CT42025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Chevrolet Tahoe2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Yukon2025 GMC Yukon XL+ 34 moreAssociated Documents - October 18, 2025•Document ID: 11024460Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6425B
- Date Added:
- October 24, 2025
- Manufacturer:
- CHEVROLET
SummaryThis 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 moreAssociated Documents - October 17, 2025•Document ID: 11024455Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6425A
- Date Added:
- October 24, 2025
- Manufacturer:
- BUICK
SummaryThis 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 moreAssociated Documents - October 16, 2025•Document ID: 11024458Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIC6551A
- Date Added:
- October 24, 2025
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
Associated Products (176)2025 Buick Enclave2025 Buick Encore2025 Buick Encore GX2025 Buick Envision2025 Buick Envista2025 Cadillac Celestiq2025 Cadillac CT42025 Cadillac CT52025 Cadillac Escalade2025 Cadillac Escalade ESV2025 Cadillac Escalade IQ2025 Cadillac Lyriq2025 Cadillac Optiq2025 Cadillac XT42025 Cadillac XT52025 Cadillac XT62025 Chevrolet Blazer2025 Chevrolet Colorado2025 Chevrolet Corvette2025 Chevrolet Equinox+ 156 moreAssociated Documents - October 8, 2025•Document ID: 11024446Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP6088
- Date Added:
- October 24, 2025
- Manufacturer:
- GMC
SummaryThis PI Addresses a possible solenoid wiring fault and how to inspect the build date to identify
Associated Products (13)Associated Documents - October 4, 2025•Document ID: 11024439Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6440
- Date Added:
- October 24, 2025
- Manufacturer:
- GMC
SummaryThe Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
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 moreAssociated Documents - September 9, 2025•Document ID: 11023091OtherUNKNOWN OR OTHER
- Mfr Comm. #:
- 13598
- Date Added:
- September 10, 2025
- Manufacturer:
- CHEVROLET
SummaryNew Vehicle Monitoring Programs Section in IVH
Associated Products (208)2026 Buick Enclave2026 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 Colorado2026 Chevrolet Equinox+ 188 moreAssociated Documents - September 8, 2025•Document ID: 11023145Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5865H
- Date Added:
- September 16, 2025
- Manufacturer:
- GMC
SummaryThis Preliminary information communicates the possibility of DTC P30BF failing on low mile vehicles due to the possibility of the cylinder 1/2 sliding barrel binding on intake camshaft.
Associated Products (14)Associated Documents - August 22, 2025•Document ID: 11022137Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIP5865G
- Date Added:
- August 26, 2025
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communicates the possibility of DTC P30BF failing on low mile vehicles due to the possibility of the cylinder 1/2 sliding barrel binding on intake camshaft.
Associated Products (14)Associated Documents