Rear Brake Moan/Groan During Brake Apply (Replace Rear Brake P

Some customers may comment on a moan/groan type noise coming from the rear of the vehicle that is heard in the vehicle's passenger compartment. This condition is most apparent during moderate brake apply; when the vehicle is slowing or approaching a stop and typically does not occur on a brand new vehicle.

This noise may be generated at the rear brake pad/brake rotor interface during a brake application, which is transmitted into the vehicle's underbody through the rear suspension components.

Replace the existing rear disc brake pads with P/N 18023377, following the service procedure in the Disc Brakes sub-section of the Service Manual.

Important: When the new pads are installed, the burnishing procedure indicated below, MUST be performed in place of the procedure described in the Service Manual. Proper burnishing is essential to insure elimination of this moan/groan noise.

Make four stops from 50 mph (80 km) with heavy/aggressive pedal apply, followed by four stops from 30 mph (48 km) with medium/moderate pedal apply. Do not overheat the brakes.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: