How to Determine Hummer H3 engine size?

[KenStone]

Hi Guys,

Apologies to the mod's if I'm posting on the wrong section. Please move if so.

I know the military HMMWV inside & out, but the Thai Army has an H3 they want me to look at. It's over heating a bit & I'm pretty sure it's the head gasket. I haven't really looked at it yet, so just guessing for now.

They made 3 different engines for the H3. Does anybody know a quick & easy method to tell which engine is installed?

It's either a 3.5 or 3.7 engine. Definitely not a 5.3 V-8.

Any help would be most appreciated! I want to make sure I get the right parts.

Ken

 

[camoyj7]

Look at the 8th digit in the vin#. 6 is a 3.5 E is a 3.7 and P is a 5.3

 

[KenStone]

Thanks Buddy! I figured it was in the VIN somewhere.

I really appreciate the help!

Ken