EI05061 - Intermediate Steering Shaft Clunk Noise or Stick-Slip (Follow Strategy Based Diagnostics)
| Subject: | EI05061 -- Intermediate Steering Shaft Clunk Noise or Stick-Slip (Follow Strategy Based Diagnostics) |
| Models: | 2005-2006 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2005-2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe |
| 2005-2006 GMC Sierra, Yukon, Yukon XL |
This bulletin is being revised to update the diagnostic information. Please discard Corporate Bulletin Number 05-02-35-003A (Section 02 -- Steering).
Condition
Some customers may comment on a "clunk" noise coming from the front of the vehicle.
Correction
Information has shown that the noise may be caused by the following three areas (listed in no particular order). Many of these concerns may initially be mis-diagnosed as an I-shaft clunk.
| • | Body mount at the A-pillar -- this noise may be heard mostly during a driving situation in which the body is twisted/flexed (i.e. hitting a pot-hole). |
| • | Frame -- this noise may be heard at the torsion bar crossmember during a turning maneuver. |
| • | I-Shaft -- this noise may be heard when turning at low speeds on rough road surfaces. |
To determine the source of the customer's concern, use chassis-ears to evaluate the body mount area and the frame torsion bar cross-member. An I-shaft concern can be felt as a "chucking" feel through the steering wheel. After the chassis-ears are installed, drive the vehicle to evaluate the customer's concern.
If it is determined that the cause of the customer's concern is due to the body mount or torsion bar crossmember, proceed with the appropriate repair. If it is determined that the cause of the concern is the I-Shaft, follow the repair procedures/bulletins found in published Service Information (SI) concerning I-shaft lubing/replacement.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
E1040 | Cushion Lower And/Or Bolt, Body - R&R or Replace | Use Published Labor Operation Time |
E1730 | Crossmember, Front Suspension - Replace | |
E7700 | Shaft, Steering Intermediate -- Replace add: to lube I-shaft |
