Brakes Grunt, Groan, Grinding Noise from Rear When Vehicle Comes to a Stop (Refinish Rear Rotors)
| Subject: | Brakes Grunt, Groan, Grinding Noise from Rear When Vehicle Comes to a Stop (Refinish Rear Rotors) |
| Models: | 2006-2008 HUMMER H3 |
Condition
Some customers may comment on a grunt, groan or grinding noise coming from the rear of the vehicle when coming to a stop.
Cause
Rotor corrosion generates a slip-stick condition transferring vibration through the suspension.
Correction
Important:
• Refer to the Brake Rotor Clean-up Procedure found in Service Bulletin 00-05-22-002J. This bulletin also lists necessary requirements for claims processing. • Measure and document the rotor thickness (minimum thickness spec -- allowable thickness after refinish) -- to determine if the rotor should be refinished or replaced.
REPLACE THE ROTORS ONLY IF THE ROTOR THICKNESS IS BELOW THE MINIMUM THICKNESS SPEC AFTER REFINISH.
Refinish the rear rotors by removing 0.4 mm from both rear rotor surfaces.
Do not replace the brake pads unless the condition requires it (i.e. excessively worn, damaged, or contaminated).
If the noise persists, a brake dampening compound may be applied to the back of each pad. This allows parts to slide freely and not vibrate when moving relative to each other.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
H0132 | Rear Brake Rotor Refinish | Use Published Labor Operation Time |
