2026 Cadillac CT4 technical service bulletins
93 technical service bulletins and manufacturer communications cover the 2026 Cadillac CT4.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- • Fixes to help prevent loss of audio • Better connectivity for Bluetooth and CarPlay • Improved...
- This update contains a required software change to help improve the overall software update and...
- This PI advises of a procedure for a Service Door Latch System message with No Related DTCs
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- This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set...
- PI to help diagnose A/C concern
- • Improvements to system responsiveness • Improvements to camera image clarity • Fixes to prevent blank...
- • Improves transmission diagnostic software
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- • Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation,...
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- • Improvements to traction and stability control on uneven terrain • Improvements to braking performance...
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- The document advise technicians after an engine repair involving removal of the camshaft actuators, the...
- Pi created to provide GM dealers with information on gathering information for projection issue
- This PI states that if SDGM DTC U3000 Sym 49 is set and no other SDGM DTCs are present, clear DTCs and...
- The document makes technicians aware of a valvetrain tick noise that is created by one or more soft...
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- • Fixes to help ensure responsiveness for the driver display and rear view camera
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- This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication...
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- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered...
- This bulletin communicates to the dealer a temporary solution to prevent a dead battery until engineering...
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- The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
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- New Vehicle Monitoring Programs Section in IVH
- Condition in which the torque on the engine thermostat housing fasteners is low
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- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
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- This service bulletin provides information on Tire Sidewall Irregularities.
- This service bulletin provides information for the technicians to use a Customer Concern Verification...
- This service bulletin provides information to dealership personnel for new vehicles with less than 1,000...
- This warranty administration bulletin provides information for dealers/technicians on System Reset and...
- This warranty administration bulletin provides policy information on vehicles outside of a California...
- This warranty administration bulletin provides policy information for GM courtesy transportation and...
- This service bulletin provides information on the proper Reflective High Temperature Heat and/or...
- The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential...
- This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be...
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