Question about 2004 Hummer H2 SUV

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My 2004 h2 hummer has electrical problems speedometer does not work . my battery runs down after its turn off and shows a red battery light when the key is out.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 2004 Hummer H2 leaking water on passenger floor

never worked on a hummer but rule of the day is that there always is a drain on the firewall on the engine side. usually a small rubber hose about two inches long direced downward. Usually you can stick your finger in there and clear it out. Don't shove anything hard into it or you can punch a hole in the evaporator core.

Posted on Apr 05, 2009

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theng_dag946
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SOURCE: Gas gauge and speedometer not working

for what i had experienced is to change the fuel sender unit and speedometer gauge and recalibrate the IPC to the latest calibration.

Posted on Jun 01, 2009

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seans46
  • 161 Answers

SOURCE: 2005 Hummer H2 battery went down and when I

if it is the factory alarm you will have to do a relearn. G.M. uses a couple different ways to do the relearn and I would think it would be the same for hummer. turn off all acc and then turn the key to the on position wait 10 minutes you will see the light on the dash flash and go out . asap turn the key to off to on 3 times quickly and the third time leave it on on again do this 3 times for 30 minutes then after the final turning of the key 3 times on the 4th time start the car. so turn off all acc like radio , a/c ect then turn key to on in 10 minutes the light on dash will flash and go out quickly turn key from off to on 3 times and once again leave on on do that 3x for 30 minutes then start the car. that is the gm relearn for security they have one on some models that start after 10 minutes but that is usualy on the cheaper cars so just do the 30 minute.

Posted on Jun 04, 2009

abdoush
  • 12 Answers

SOURCE: change light on 2006 hummer h2

it can be easily changed by removing the plastic cover then u will see the light bulb, don't try to change it from the back, it wont open :)

Posted on Sep 08, 2009

  • 1 Answer

SOURCE: I need to remove the luggage racks from my 2007 Hummer h2 SUT

I have the same vehicle and was able to remove mine with the following steps: 1) remove light behind each rear of luggage rack rail using phillips screwdriver (one screw each side). 2) remove molding underneath each light using T20 torx driver (2 screws each side). 3) Loosen cross rails nobs. 4) Side cross rails off of roof.

Posted on Dec 27, 2009

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1 Answer

Battery light stays on after key is removed on hummer h2


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.

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CEL light on? Read trans codes and I bet you find the trans speed sensor #1 has failed.

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We had this problem on our H2. Ends up that we had to buy a new instrument cluster. In the mean time we used the speed calibration on our GPS unit to say out of tickets. A year later we finally replaced the cluster. Check out the Hummer forums for best places to buy.

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Pretty common problem with these. Here's a guide to learn how to fix GM instrument clusters yourself, I used it to fix mine and it worked great.How to guide for H2 instrument cluster repair

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hi, i may suggest that you see an auto electrician on this to trace up electrical faults, it may go worst if not attended immediately.

Feb 13, 2010 | 2004 Hummer H2

1 Answer

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they have a controll module afixed to the wiper motor itself. these modules have been an issue for gm for some time. they are very simple to replace and "usually" fix the issue.

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4 Answers

2004 hummer h2 leaks water from roof over front


Seal all the lights on top. Mine flooded from the water running down the light harness wires. Used clear rtv sealant and fixed it. You will have to remove the seal the two larger lights on the corners.

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1 Answer

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for what i had experienced is to change the fuel sender unit and speedometer gauge and recalibrate the IPC to the latest calibration.

May 30, 2009 | 2003 Hummer H2

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hummer h2 hydraulic keeps running depleting battery.

May 22, 2009 | 2004 Hummer H2

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