i got my h2 back the other day. the dealer replaced the rear yoke coming out of the transfer case. no more clunk noise. now im fighting with them about my rattle from under the truck. its the exhaust they say.

 

make sure they tightened the skid plates correctly.

My dealer didn't do mine right after they replaced my wifes tranny pump in our 07

 

Mine was not drive line. Body bushings for sure. It also cured a lot of weird vibrations that I had issue with before. It really made my H2 ride like new.

 

Do you have the part number for the insulator kit?

 

Let me dig out my paper work.

 

I took my 09 H2 to the Chevy dealer after no luck at Cadillac and GMC. Chevy knew right away that it was the body mounts causing the problem, if you download the TSB's for the 2007/2008 model year on the H2 it's specified. GM did not revise the bulletins to include the 2009 since they disolved the Hummer company. Check the following bulletin's, they are all issues with my 2009 H2

Bulletin No.: 06-08-61-003B
Bulletin No.: 07-08-61-006C
Bulletin No.: 03-08-61-002I
Bulletin No.: 01-04-17-004B
Bulletin No.: 09-04-21-003B
Bulletin No.: 09-04-17-002
(alldatadiy.com)

One of the bulletin's will show you how to correct the problem with a graphic, step by step instructions