Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I am going to send you a bulletin, it may or may not help. But without being able to hear it to pin point the location it could be pretty hard to find. I will send you one that related to the front, but if you find that you can feel it in the steering or it only does it with the AC on or something on that order, let me know and I will send some others that may help. They even have one for rear springs making a slapping sound, but if you don't think it is coming from the rear, I will hold off on that one. So, take a look at what I am sending this time and lest me know if it sounds like it may be related to your problem or not. Thanks
This bulletin is being revised to update the correction and parts information. Please discard Corporate Bulletin Number 03-03-08-002A (Section 03 -- Suspension).
Some customers may comment on a rattle or squeak type noise coming from the front of the vehicle.
The front shock absorber plastic pilot ring may be wearing out, causing the shock to misalign in the insulator.
DO NOT replace the shock . Replace the lower portion, P/N 15834275 , of the upper insulator assembly using the procedure listed below. This new insulator has a taller plastic pilot ring that is attached to the metal sleeve to aid in the proper alignment of the insulators.
Important: Be sure to center the shock in the frame bracket and tighten the upper mounting nut when the vehicle is on the ground.
Insulator Asm. - Frt. S/ABS (Lower Part of Upper Insulator)
I am going to send you the one for the steering shaft. This is by far the most common problem on your particular model. I will also send the one on the rear springs, you may be able to tell just by looking at the pads on the springs. You may not always feel the problem with the steering shaft. Let me know. Thanks
This bulletin is being revised to update the repair procedure with a permanent fix. Please discard Corporate Bulletin Number 00-02-35-003L (Section 02 -- Steering).
Some customers may comment on a clunk-type noise coming from under the hood that also can be felt in the steering wheel. These conditions may be more noticeable when turning at low speeds on rough road surfaces.
Use the information below to help diagnose the source of the noise.
DON'T DO THIS
Replace the I-Shaft with P/N 19153614.
Do NOT lubricate or exercise the I-Shaft.
Replace the steering column upper intermediate shaft with an improved design shaft that will eliminate the clunk noise using the procedure listed below.
Notice: On the 2002 and later model year vehicles, the steering column LOCK was removed from the steering column. It is critical that the J 42640 - Steering column Anti-Rotation Pin is used when servicing steering columns on 2002 and later model year vehicles. Failure to use the J 42640 may result in damage to the SIR coil.
Tighten Tighten the bolt to 47 N·m (35 lb ft).
Tighten Tighten the bolt to 50 N·m (37 lb ft).
Tighten Tighten the nuts to 20 N·m (15 lb ft).
Shaft - Upper Intermediate Steering