20 Most Recent 2004 Hummer H2 Questions & Answers

I had the same problem, Youl need to do one of the following, Change the eginition module or change the driver side control pannael the one for the window/locks (if you can crank the key a bit when its turned off it may help sometimes) sometimes a bit of rain comes in the window and down into the control (locks/window switch) and shorts it out. Trust me I spent time and money to figure out its that or your egnition module. EBAY for the parts it will only cost $100

2004 Hummer H2 | Answered on Mar 20, 2019

Bad or damaged wire at the DS seat connectors. Had to install new connectors. Seat wires get cought in the track and pull down from the seat. It also gets stepped on and pulled out. /repair wires and sucure them up in the seat.

2004 Hummer H2 | Answered on Feb 09, 2019

plz check and get wheel balancing and alignment done, vibration should go or reduce significantly

2004 Hummer H2 | Answered on Jan 08, 2019

Since this is a brake issue, please take the hummer in to a shop and have it looked at. Please do not drive it until you do.

2004 Hummer H2 | Answered on Dec 12, 2017

Coolant leaking into engine?? Transmission fluid leak into coolant?

2004 Hummer H2 | Answered on Nov 14, 2017

because you are going back to a dealer
take it to an accredited auto electrician and have the electric system checked properly instead of guessing the fault

2004 Hummer H2 | Answered on Jun 20, 2017

The power folding function of your exterior mirrors on your '04 H2 depends on a plastic gear to collapse those mirrors at the touch of a button. That plastic gear strips very easily. The service adviser at our Hummer dealership said that problem was rectified in later model years with a redesign of of the collapsing mechanism of those mirrors.

I don't mind manually folding our mirrors, and I was afraid to ask about the cost of the parts required to solve the issue. The service guy didn't volunteer the cost of the fix. Not typically covered by aftermarket extended service/warranty plans.

2004 Hummer H2 | Answered on Mar 18, 2017

attached to the frame just to the right of your rear tire on passenger side. just to the left of rear tire on driver side. there are two of them that look like a little hinge. best of luck.

2004 Hummer H2 | Answered on Jan 02, 2017

Check the battery has good charge, should be over 12v with engine off and 13-15v when running.
If it's not holding a charge correctly it will cause light to come on as low power.
There may be something shorted too, keep your eye on power levels with a tester....when you switch off, check....then check again next day "before" you start engine. Look for drop below 12v.

2004 Hummer H2 | Answered on Oct 12, 2016

The A/C will remove humidity when it's running. There is a drain tube that lets the accumulated condensate empty on the ground. It may be dripping onto the exhaust. Nothing to worry about.

2004 Hummer H2 | Answered on Oct 07, 2016

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