My 06 H3 Hummer won't after it rain or washed

Asked by Feb 04, 2017 at 11:52 PM about the 2006 Hummer H3 4dr SUV 4WD

Question type: Maintenance & Repair

I've been having a lot of electrical problems with
my H3 Hummer 2006 everytime it rains or I take
the car and get a wash it will not crank up I don't
know what's wrong with it I've tried everything to
keep this vehicle I'm just in over my head

2 Answers


The problem electrical connections need to be sealed with dielectric grease to keep moisture out.


Ive dealt with this problem on my 2007 H3 for years and did tons of research and finally got it fixed in my first attempt. In my case it was the Ignition Lock Cylinder. It cost just under $300 parts and labor. I'd advise not going to the dealer unless you want to pay twice that amount. I bought the part at AutoZone and took it to my local repair shop. It has started every time for the past 6 months since the repair and during several rainy days. Why the rain affects this device is unknown but I think the cylinder itself just wears out over time due to the constant weight of multiple keys hanging from the ignition. Keep in mind that your issue might be different but this is a good place to start. Good luck and let me know if this fix worked for you.

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