Why did you start at the engine?
Did you check for trouble codes?

I can give you a list of potential causes:

maf
map
cas
tps
tbi
fis
fpm
pcv
ecm
++++++++++++many more

Scan the computer for codes and post them.

 

When it happened, I did something extremely stupid, removed the battery cable. But my old engine was going out anyway, so replaced it for a hell of a deal. 1100 installed for a engine with 32,000

 

i am new to forum. had 07 h3 since july 07. bought new. Ihooked a battery to wrong terminals. fried alternator. got new one checked that it was good. it doesnt seem to be sending a charge to the battery and the charging system symbol stays on in dash. helllp please.

 

Try starting a new thread.

 

Thread jacking lol

 

There is what they call a MEGA fuse inside the fuse box under hood. I had the same exact thing happen to my truck. This is first vehicle I've ever seen that is fused between alternator and battery. Only a couple bucks at part store and super easy to replace. It actually bolts in to the fuse box if I recall corectly.

 

Welcome to HF.

While we appreciate your effort to try to help..... adding information to a TWO YEAR OLD THREAD???? really doesn't.

https://www.hummerforums.com/forum/n...bumping-23220/