Body mount bolts-questions?

[2007HummerH2]

Just curious if anyone can answer the following questions, regarding the H3 body mount bolts.

1) What size are they?

2) Are they a shouldered bolt (threads are only on the end of the bolt)?

3) Length of factory bolts?

I've done part searches, etc.....and couldn't find the answer. I don't have the time to take out one of my bolts and check it out.....I drive it daily.....so I leave in the dark and get home in the dark!

 

[alrock]

No idea. Never removed those bolts (yet)

 

[4speedfunk]

I used to offer a Cargo Kit for the H3. The four rear-most bolts got replaced with longer ones (these are the four body mount bolts with the cargo loops). The bolt thread size is: M10 x 1.5 pitch, and the factory length is around 50mm. The bolts I included were 1-1/2" longer than stock and they were 90mm. No special shoulder.

 

[2007HummerH2]

Hmmm....I took one of my very rear body mounts apart. I found out why they make the noise that they do. Between the bolt and the actual rubber bushings, GM installs a metal shaft all the way around, from the body to the frame. It doesn't allow you to tighten up the bushings, and you bottom up on the metal shaft. I had the same problem with my front shocks.......I couldn't tighten them up. Luckily my fiance, Larry, is a machinist!
He helped me adjust the metal shaft and now my front shocks are tight and don't rattle around anymore. Looks like I will be doing the same to the body mounts and get rid of the clanks, clunks, and popping sounds. The TSB fix only works for a short time.....then the same issue starts in again.....