This service bulletin addresses a front brake grind/groan noise issue on certain 2020-2023 models of Chevrolet, Buick, Cadillac, and GMC vehicles.
The condition is characterized by a grinding/groaning sound on the first few stops, which may feel like ABS is active, but it is not.
Cause:
The cause of the condition is the front disc brake pad material.
Correction:
Replace the front disc brake pads with the specified parts, scuff the rotors, and perform the Brake Pad and Rotor Burnishing procedure.
A minimum of 20 stop events must be completed after the correction.
Warranty Information:
Repairs made for this specific concern will be covered for a period of 24 months or 24,000 miles or 40,000 km, whichever occurs first.
Manual:
Download: Service Bulletin 21-NA-142: Front Brake Grind/Groan Noise After Sitting Overnight (2020-2023 models)
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