Question about 2007 Hummer H3
Posted by Anonymous on
I looks like you have been having a lot of electrical problems with your Hummer. Based on that, I would say that there is a bad/loose ground somewhere. From your description of the problem, it is most likely a bad battery cable.
I suggest you look under the hood and check the battery terminals and cables. I have seen swollen battery cables that are full of corrosion. Especially on side-terminal batteries. If the cable is swollen near the battery terminal, use a razor knife and split the insulation at the point of the swelling and you will see green and/or white corrosion in that area. Replace the cable, because it can cause other problems in the future - no start, no lights, stalling. etc. Also, any loose or corroded wire connections on the inner-fenders and firewall could be in issue.
If everything looks good under the hood, the next thing to check is your ignition switch. I once had a 1995 Pontiac Transport that would stall at red lights/stop signs. After following the above suggestions, I removed the ignition switch and it fell apart in my hand! It was also badly burned inside. After replacing it, the problem was solved.
I have never worked on a Hummer, but since it was a GM product, it is most likely mounted to the steering column , under the dash. You will most likely have to remove 2 bolts that hold the steering column up, and lower the column for access.
Posted on Apr 21, 2015
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Posted on Jan 02, 2017
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