clunk

Bobby Digital · June 27, 2006

I have '06 2500HD Duramax that has a clunk under my feet when turn right and sometimes left. Anyone else experienced this? It's usually when I'm turning a corner and accelerating. Today I was able to get it do do it when I was swerving in a parking lot back and forth trying to diag it. I would hear a clunk and could feel it on the floor board. I just had my steering gear lubed so that shouldn't be it. Any ideas?? confused.gif

Thanks!

I love my truck!! patriot.gif

PaulieK · June 27, 2006

Had the same problem. It turned out to be the drivers rear leef spring was clacking when the truck shifted weight from one side to the other over uneven surfaces. They lubed the springs and the noise was gone.

number9 · June 28, 2006

My truck has had a clunk for a while when I pull off my driveway into the street. Just the other day I was putting a set of inner fender liners/flaps on that I made (I copied the ones GM offered for $90) and seen the left rear overlaod was missing the plastic bumper pad that used to be on it. I never put 2 and 2 together until just now. I bet that's what is causing my clunk. There is a guy over on www.dieselplace.com that offers rubber caps for the springs for this very thing. Thanks guys for the posts and setting the light off in my head.

bobcat5544 · June 28, 2006

Subject: Pop/Clunk/Click Noise on Right or Left Turns - keywords body floor front mount pan steer suspension #PIT3118K - (02/24/2006)

Models: 2002-2006 Cadillac Escalade Models

2002-2006 Chevrolet Avalanche

1999-2006 Chevrolet Silverado

2000-2006 Chevrolet Suburban, Tahoe

1999-2006 GMC Sierra

2000-2006 GMC Yukon Models

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Owners may comment on a pop, clunk or thump type noise when turning left or right. This noise may be heard and/or felt at either the drivers or passenger floor pan area.

Recommendation/Instructions:

Note: Body mounts are number as below and depending on the body configuration the number of mounts will vary. Example, a Suburban will use all 12 mounts listed below and a Regular Cab Truck will only use the first 6 listed below.

At Rad Support in front of vehicle are the "Front End Sheet Metal (FESM) Body Mounts" Left Hand & Right Hand.

At the A-Pillar of the body are the "#1 Body Mounts" Left Hand & Right Hand.

At the B-Pillar of the body are the "#2 Body Mounts" Left Hand & Right Hand.

At the C-Pillar of the body are the "#3 Body Mounts" Left Hand & Right Hand.

At the Quarter Panel wheel opening are the "#4 Body Mounts" Left Hand & Right Hand.

At the tailgate in the rear are the "#5 Body Mounts" Left Hand & Right Hand.

This noise may be caused by the #1 body mount. To correct this concern install 4 of the following insulators:

Install two insulators, P/N 15053229 on the bottom of each #1 body mount between the body mount and frame. Before these insulators can be installed, they need to be trimmed to fit. The inner diameter will need to be cut to 2 inches (52 mm) and the outer diameter to 3 1/8 inches (80 mm).

Tighten the body mount bolts to 85 N·m (63 lb ft).

Test drive the vehicle to verify the repair.

Important: While the #1 body mounts are removed check the underbody area that interfaces with the top of the body mount for excess build-up of E-Coat Primer or other foreign material. If the surface is not smooth use a 90 degree die grinder, or equivalent to remove the excessive build-up. Apply an anti-corrosion protection to the bare surface as necessary to prevent rusting and re-assemble.

Note: During the warranty submittal, please identify the location of the body mount that was serviced per the location list documented above.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.