Tahoe 2WD V8-6.0L Hybrid (2008)
Coil Spring Insulator: Customer Interest
Suspension - Squeak/Rattle/Clunk From Rear of Vehicle
TECHNICAL
Bulletin No.: 06-03-09-007C
Date: March 17, 2010
Subject: Squeak, Rattle or Clunk Noise in Rear Suspension Over Bumps, During Acceleration or While Braking (Inspect/Rotate Rear Coil Springs and
Inspect Lower Control Arm Bolts for Proper Torque)
Models:
2007-2009 Chevrolet Tahoe 1500 Series Only
2007-2009 GMC Yukon 1500 Series Only
with Premium Smooth Ride (RPO ZW7) or Off Road (RPO Z71) Chassis Package
Vehicles Built Prior to March 1, 2009
Supercede:
This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 06-03-09-007B (Section 03 - Suspension).
Condition
Some customers may comment on a squeak or rattling noise in the rear of the vehicle when going over bumps, during acceleration or while braking.
Also, a clunk noise may be heard in the rear suspension when jounced or moved.
Cause
This condition may be caused by the rear spring insulator contacting the vehicle's frame rail and creating the noise, or the lower control arm bolts may
not be tightened to specification.
Correction
Inspect/rotate the position of the rear coil springs and inspect the lower control arm bolts for proper torque.
1. Lift the vehicle and support the rear axle. Refer to Lifting and Jacking the Vehicle in SI.
2. Remove the lower shock absorber bolts and nuts.
3. Lower the rear axle until the rear coil springs can be rotated.
4. Rotate the springs to gain the most amount of clearance between the spring and the side of the vehicle's frame rail.
5. Inspect the frame rail for any bare metal. If a bare metal spot is found, apply an anti-corrosion coating (Daubert) to the frame, P/N 12346501 (in
Canada, P/N 10952414) or equivalent. Refer to Anti-Corrosion Treatment and Repair in SI.
6. Inspect the spring plastic insulator sleeve for damage. If damage is found on the plastic insulator sleeve, it may be necessary to replace the spring.
7. Raise the rear axle.
8. Install the shock absorber, bolts and nuts.
Tighten
Tighten the lower shock absorber bolts and nuts to 115 Nm (85 lb ft).
9. Inspect the lower control arm bolts for proper torque.
Important
Do not tighten the lower control arm bolts unless the suspension is at ride height.
Tighten
Tighten the lower control arm to frame bolts to 140 Nm (103 lb ft).
Tighten
Tighten the lower control arm to axle bolts to 160 Nm (118 lb ft).
Warranty Information
