Body Mounts??

[MikeXML320]

I have had a bunch of clunking in the front and rear end. The dealer has looked at it several times. They said it was the skid plate twisting so they put plastic washers between the skid plate and the body....still popped.

Finally the tec was on a test drive with me and I asked him. He told me about the body bushings and told me to put a plastic isolator between the body and the mount. There are two parts to the mount an upper bushing and a lower bushing. I removed all of the lowers....they all fell apart. They are rubber bushings molded to a metal plate, they were rusted out and not one peace anymore. I replaced all of the lower bushings 12.50 ea X10. The body is now super tight and no popping.....

I did put my rear tire carrier back on and I do have a little popping from it...but I managed to engineer it, now all is quiet.

The uppers are a pain to get out. I did take out the very back two to look at them.

This worked for me thought I would share.

[twr]

hi on 2008 h2 the crossmember mount for the front diff housing. Their is a big steel washer between the front diff. and the rubber mount, lube the washer on both sides with silcone grease. The clunking i had was when i was accelerating from a stop light. It took me a 1/2 hour to find it because it was checking it by myself. I hope this explains it better.

[HumminNBoatin']

Ok I see what you are saying. Yeah I will pull that bushing that the diff sits on an lub it. I wonder if making washers from an antifreeze bottle would work to fix that bushing as well??? I will have to see.

I have found that a fix is cutting a plactic bottle the same size as the mylar washers pictured above and using them in the same fashion works for this as well. So I think I am going to give that a try before I buy all new body mounts. Does anyone know the torque specs????

Thanks again for all the good replies guys.

[twr]

hi i just put grease on mine. The body mounts are torqued to 63 ft. lb.

[twr]

hi there is another TSB, the 4 bolts bolts that mount the front crossmember gm has added big hardend washers to the front and rear of the 4 bolts to stop clunking and popping noises from the front end. I did not need to do this to my truck

[twr]

*****Washer sizes are in the picture in post below*****


Snap/Popping Type Noise Coming from Front of Vehicle (Remove Bolt-In Front Crossmember and Add Washers)

Models:
2003-2006 Cadillac Escalade
2003-2006 Chevrolet Avalanche, Suburban, Tahoe
2004-2007 Chevrolet Silverado (Classic)
2003-2006 GMC Yukon, Yukon XL
2004-2007 GMC Sierra (Classic)
2003-2008 HUMMER H2

1500 Series (1/2 Ton) and 2500 Series (3/4 Ton) with Two-Wheel Drive

Attention: This bulletin only applies to 1500/2500 Series 2WD and HUMMER H2 vehicles with recirculating ball type steering.

Supercede:

This bulletin is being revised to update the parts information to include a new washer for HUMMER H2. Please discard Corporate Bulletin Number 03-08-61-002H (Section 08 - Body and Accessories).

Condition

Some customers may comment on a snap or popping-type noise coming from the front of the vehicle. This condition is most apparent during hard left or right turns at low speeds. Going over bumps while turning may also aid in producing this noise.

Correction

Remove the bolt-in front crossmember and add washers using the procedure listed below.

DO NOT slot the mounting holes on the crossmember as stated in previous bulletins. Slotting the holes has been found to be less effective and, in some cases, causes the noise condition to be more prevalent.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.

Remove the mounting nuts, bolts and the front crossmember from the vehicle.

Clean all the undercoating off the crossmember in the area of the mounting holes.

Reinstall the crossmember with the bolts and nuts. On the driver and passenger side, add washer P/N 11509592 (C/K models) or P/N 15567836 (H2), or equivalent hardened washer (see dimensions shown), at each bolt head and nut location.

Tighten

Tighten the bolts to 120 N.m (89 lb ft).

Apply an even coat of Anti-Corrosion Coating, P/N 12346501 (in Canada, 10952414), or equivalent, to the crossmember where removed. Overlap the original coating in order to provide an effective corrosion protection

[twr]

here are washer sizes