2010 Hummer H3 will crank but won't start

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#11

10-28-2023, 07:22 AM

ianq

Junior Member

Join Date: Oct 2023

Posts: 1

H3no start

Quote:

Originally Posted by Doc Olds

If the CEL is ON, there is a stored code somewhere. How many mikes on it?

Does it have a sunroof? If so, has the passenger side floor ever gotten wet?

Easy stuff first.
Does it still have the crappy azzed OEM battery terminal connectors? If so, hack them off immediately and replace with your favorite aftermarket brand, like Stingers. The OEM battery terminal connectors are the known #1 cause for H3/3T electrical gremlins.

. Whats the sunroof issue? I do have a leaky one and floor has been wet

#12

10-28-2023, 02:17 PM

Golden Hurricane

Senior Member

Join Date: Aug 2022

Location: Texas

Posts: 197

Ianq
If you have had a wet carpet, especially if the passenger side has been wet, the BCM has probably had moisture also!
A. Read the first suggestion about the sunroof drains! This information is located just above the Topics Area on the Hummer H3 forum.
B. You may also want to read several posts regarding how owners have "cleaned" the BCM... actually pretty simple. Just be certain to follow the advice. Ask for clarification on anything you don't clearly understand.
Lots of great people on this forum are willing to help you. Happy Trails