Colorado 4WD V8-5.3L (2010)
Body / Frame Mount Bushing: All Technical Service Bulletins
Body - Underbody Squeak/Creak/Crunch Noise
TECHNICAL
Bulletin No.: 11-08-61-001A
Date: April 14, 2011
Subject: Underbody Squeak/Creak/Crunch Noise During Slow Speed Maneuvers (Replace Body Mount Cushions)
Models:
2004-2011 Chevrolet Colorado
2004-2011 GMC Canyon
2006-2010 HUMMER H3
Supercede:
This bulletin is being revised to update the Parts Information. Please discard Corporate Bulletin Number 11-08-61-001 (Section 08 - Body and
Accessories).
Condition
Some customers may comment on a squeak/creak/crunch type noise coming from under the vehicle while driving. This condition is most noticeable
when driving at low speeds over uneven surfaces such as driveway entrances or in parking structures.
Cause
This condition may be caused by friction between the upper and lower body mount cushion assemblies.
Correction
A revised body mount cushion assembly is now available to correct this condition. The revised part has an anti-friction coating that will eliminate the
noise. Use the following steps to diagnose the condition and install the required service part(s).
To diagnose this concern, use chassis ears to determine if the noise is coming from the body mount cushion. If the source of the noise is determined to be
caused by the body mount cushion, replace all of the upper body mount cushion assemblies on the vehicle with the revised parts.
Use the following steps to install the revised cushion assemblies.
Important
On HUMMER H3 models, it is necessary to disconnect the fuel fill pipe from the fuel tank to prevent damage when lifting the body.
Note
On vehicles equipped with a front skid plate, it may be necessary to remove the skid plate from the vehicle to access the front mounts.
1. Disconnect the front parking brake cable from the parking brake equalizer. Refer to Parking Brake Lever Pedal Assembly Replacement in SI.
Warning
When you remove the body cushions, do NOT separate the frame from the body more than is necessary (over 40 mm (1.57 in). Possible personal injury
and damage to multiple parts may result if you do not follow the guides outlined below:
^ Intermediate steering shaft - Do not allow the shaft to extend more than 25 mm (1 in).
^ Fuel tank filler hose - Do not stretch the hose excessively.
^ Tail/Turn signal lamp wiring/rear lamps junction block - Leave slack in the wires.
^ Park brake cable - Leave slack in the cable.
^ Body ground straps - Leave slack in the wire.
2. Replace all of the upper cushion assemblies on the vehicle. Refer to Drivetrain and Front Suspension Frame Insulator Replacement in SI.
3. Reconnect the front parking brake cable to the parking brake equalizer. Refer to Parking Brake Lever Pedal Assembly Replacement in SI.
