H3 L5-3.7L (2007)
Brake Rotor/Disc: Technical Service Bulletins
Brakes - Noise from Rear When Vehicle Comes to a Stop
TECHNICAL
Bulletin No.: 07-05-23-004B
Date: October 27, 2009
Subject: Brakes Grunt, Groan, Grinding Noise from Rear When Vehicle Comes to a Stop (Refinish Rear Rotors)
Models:
2006-2010 HUMMER H3, H3T
Supercede:
This bulletin is being revised to add the 2010 model year and update the correction information. Please discard Corporate Bulletin Number
07-05-23-004A (Section 05 - Brakes).
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
Tip
Utilize 10 mm bolts in the rotor removal holes to break rotors free, if necessary.
Refinish the rear rotors by removing 0.4 mm (0.01575 in) from both rear rotor surfaces (This is critical).
Important
The brake pads should be reinstalled back in their original location.
Record before and after measurements to confirm 0.4 mm (0.01575 in) has been removed from each rotor.
REPLACE THE ROTORS ONLY IF THE ROTOR THICKNESS IS BELOW THE MINIMUM THICKNESS SPEC AFTER REFINISH.
Do not replace the brake pads unless the condition requires it (i.e. excessively worn, damaged, or contaminated). If the brake pads are replaced, the
grease pack that is enclosed in the pad kit must be properly applied to both surfaces of the black inner shim for optimum brake system performance.
Follow the instructions below. Future pad kits will include this information.
