Clunk or Knock Noise Heard and/or Felt Through Steering Wheel or Brake and Accelerator Pedals (Replace Lower Steering (Intermediate) Shaft). Chevrolet Colorado Pickup

Subject:

Clunk or Knock Noise Heard and/or Felt Through Steering Wheel or Brake and Accelerator Pedals (Replace Lower Steering [Intermediate] Shaft)

Models:

2007-2008 Chevrolet Colorado

2007-2008 GMC Canyon

2007-2008 HUMMER H3

Excludes H3 V8s sold in North America

Includes H3G Vehicles Built PRIOR to Serial Number 422858 (LHD) / 425990 (RHD)

This bulletin is being revised to include 2008 model year and include H3G VIN breakpoint information. Please discard Corporate Bulletin Number 07-02-35-006B (Section 02 -- Steering).

Condition

Some customers may comment on a clunk or knock noise being heard or felt through the steering wheel and/or brake and accelerator pedals. This issue may be more prevalent in hotter temperatures.

Cause

This condition may be caused by a slip/stick condition in the lower steering (intermediate) shaft.

Correction

Important: When replacing the lower intermediate shaft, follow service procedures found in published Service Information (SI). Be sure to ALWAYS:

•	Keep the hub straight when removing/attaching the lower I-shaft to the upper steering column.

•	Pin the steering column using the J 42640 - Steering Column Locking Pin in its straight position prior to removing the lower I-shaft. Keep it pinned until after the new lower I-shaft is installed.

Failure to perform these steps could result in a mis-alignment of the upper steering column to the lower I-shaft and cause DTC C0710 and "Serv Stab System" message to occur.

Replace the lower steering (intermediate) shaft. The new i-shaft can be identified by a yellow or green mark as identified in the following graphic.

Parts Information

Due to limited quantities, parts should not be ordered for stocking purposes.

Part Number	Description
25900714	Shaft - Lower Steering (Colorado / Canyon and H3 LHD)
24300315	Shaft -- Lower Steering (H3 RHD)
25900715	Shaft - Lower Steering (H3G LHD) (does not apply to H3 V8s sold in North America)

Part Number

Description

25900714

Shaft - Lower Steering

(Colorado / Canyon and H3 LHD)

24300315

Shaft -- Lower Steering

(H3 RHD)

25900715

Shaft - Lower Steering

(H3G LHD)

(does not apply to H3 V8s sold in North America)

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation	Description	Labor Time
E7700	Shaft, Steering Intermediate - Replace (Lower)	Use Published Labor Operation Time