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.

Your Answer


Looking for a Used H3 in your area?

CarGurus has 39 nationwide H3 listings and the tools to find you a great deal.

Postal Code:

Hummer H3 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Hummer H2
21 listings
Used Hummer H2 SUT
2 listings
Used Jeep Wrangler Unlimited
144 Great Deals out of 6,424 listings starting at $9,995
Used Jeep Wrangler
101 Great Deals out of 2,162 listings starting at $7,477
Used Ford F-150
551 Great Deals out of 10,128 listings starting at $3,490
Used Chevrolet Tahoe
4 Great Deals out of 900 listings starting at $8,500
Used Cadillac Escalade
5 Great Deals out of 504 listings starting at $4,980
Used Chevrolet Silverado 1500
163 Great Deals out of 12,136 listings starting at $1,895
Used Toyota FJ Cruiser
62 listings starting at $10,888
Used Jeep Grand Cherokee
149 Great Deals out of 4,000 listings starting at $2,400
Used Toyota Tacoma
28 Great Deals out of 1,353 listings starting at $6,900
Used Toyota 4Runner
4 Great Deals out of 531 listings starting at $4,995
Used Ford Mustang
1,056 listings starting at $3,900

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.