[finall]

Ok, I officially declare "Adam in CO" a Hummer Guru God, and I bow to him.

The problem is solved!!!!! I love my Hummer again~!

The big local Hummer Dealer could not figure this out.

I was starting to hate it because it was vibrating me to death.

It was in fact the droning from the exhaust, that transfered to the UCP, and then to the rest of the vehicle. Took the UCP off. Just came back from a 60 mile run, and NO MORE vibrating growl NOISE!

I bet every 2007 H2 has this problem, since my exhaust was 1/2" too low in that spot, and that is a lot. I bet they do not have that much tolerance during production.

So off to the dealer to get their muffler shop to repair this HUGE defect. I would be surprised if there was not a TSB on it.

In fact, does anyone know about a TSB on this that I could take to the dealer?

The other brand new 07 I took for a spin odd the Dealer's lot to compare definitely has the same problem. I am glad I did not give up and assume that there was no problem, and that they all sounded like that.

Thanks to great help from great guys like "Adam in CO", on this forum, weird problems get diagnoses and fixed. Thank God for this forum, whithout which I would still be in the dark about the problem, or just have to live with it.

I love my Hummer again~!