This service bulletin is for various models from 2021 to 2023, including the Buick Enclave, XTS, XT6, Traverse, and Acadia, as well as the Cadillac XT6, and Chevrolet and GMC Blazer. Some customers have reported hearing a humming, whining, squealing, or whistling noise while driving between 20-70 MPH, which may be caused by a damaged bearing.
Correction:
Technicians are to replace the torque tube assembly, as described in the Driveline Torque Tube Replacement procedure in the Service Manual.
Important Notes:
Service agents must comply with all applicable laws, and in the event of a conflict, must follow those laws. This bulletin is intended for professional technicians and is not for do-it-yourself enthusiasts.
Manual:
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