2021-2022 Cadillac XTS, XT6, Chevrolet Blazer, GMC Acadia Service Bulletin: DTC P261F Coolant Pump A Stuck On Setting Check Engine Lamp to Illuminate After Two Faults

Summary of Service Bulletin

This service bulletin addresses an issue with the Check Engine lamp illuminating due to a stuck coolant pump flow caused by high acceleration. The solution is to reprogram the Engine Control Module (ECM) with a new calibration, and NOT to replace the Auxiliary Coolant Pump.

Technicians are cautioned to follow proper procedure when downloading and installing the update files to avoid programming failure or control module damage. The bulletin also provides instructions for verifying the VIN, reprogramming the ECM, and clearing DTCs after programming.

Warranty information is provided, including coverage codes and labor operation details.

Manual:

Download: 2021-2022 Cadillac XTS, XT6, Chevrolet Blazer, GMC Acadia Service Bulletin: DTC P261F Coolant Pump A Stuck On Setting Check Engine Lamp to Illuminate After Two Faults

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