2004 Hummer H2 electrical problems

Filed Feb 10, 2026 · Electrical · 210,000 miles · FL

Odometer Fraud. The contact purchased a 2004 Hummer H2. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 200,000. It was later discovered that the mileage on the Title was 210,000. Additionally, the contact stated she felt pressured to purchase the vehicle, signed the contract, and was unable to recoup the funds.

Filed Feb 22, 2022 · Electrical, Engine · TX

Yesterday I turned off the alarm and unlocked the doors via the keypad. I opened the driver door and my wife opened the passenger rear door and the Hummer H2 started. No key in the ignition and the fob does not have a start button. I then got in the car and inserted the key and turned the key to ON then to off and the vehicle would not shut off. Only after cycling through the gears was I able to shut off the vehicle. I have now disconnected the battery to prevent another unwanted start.

Filed Feb 17, 2019 · Electrical · 122,000 miles · NC

Whole cluster lights up on car door locks don't work radio won't go off air bag lights on all brake lights on , this was going down a city street driving

Filed Oct 8, 2018 · Driver assistance, Electrical · 165,975 miles · OK

I am having a problem with my hummer 2004. The lock light comes on and my hummer will not start. This is so horrible the problem started about 3 months ago. Everytime that light comes on I have to waite 15to 25 minutes for it to start again.

Filed Sep 12, 2017 · Brakes, Electrical · 111,644 miles · OR · fire

As I was driving on I 5 in oregon I experienced a complete failure of the electrical system and brake systems. The vehicle was on cruise control and when I disengaged it all of the safety warning light appeared on the dashboard. I pressed on the brakes and they were a complete failure also. At this time the dashboard lights and controls went off and I loss power. I was able to get to the side of the road when I noticed smoke coming from under the hood. I got my daughter out of the vehicle to a safe distance and opened the hood and the main fuse relay panel was fully engulfed in fire. I called 911. In the approx. 5 min. The time the fire truck arrived the truck was consumed and fully gutted out from the fire.

Filed Oct 13, 2016 · Airbags, Driver assistance · FL

I have a 2004 hummer h2, the entire instrument panel malfunctions.. Fuel gauge, speedometer, oil gauges .keyless entry will not work,etc. Reduced engine power message appears and vehicle automatically slowly reducing speed to 15 miles per hr while driving at high speed. Air bag light will not shut off. These issues are a safety hazard and I would appreciate assitance and resulution as soon as possible. This truck has less than 75,000 miles and has been well maintained. .

Filed Oct 23, 2014 · Electrical · 113,784 miles · TN

I feel that this key problem falling out of the ignition, key will not turn on or off making it hard to control when the key is in the ignition and causing it not to start. I had this same problem on a 2003 isuzu ascender. Also the "driver information center" has quit working right which controls a lot of things on the vehicle. I think it is a defective switch from gm who also built my 2003 isuzu.

Filed May 17, 2012 · Electrical, Lights · 98,720 miles · GA

1. Voltage meter erratic 2. Windshield wipers stopped working, wipers stopped and remain in the middle of the windshield. 3. Dashboard instrument panel remained on with battery light and radio after switching off and locking vehicle. It was necessary to disconnect the battery to disable this condition. On morning of 5/17/2012, we reconnected the battery and voltage meter and instrument panel was normal. Windshield wipers are still inoperable.

Filed Apr 4, 2012 · Electrical · 43,000 miles · CT

Tl* the contact owns a 2004 hummer h2. The contact stated that the speedometer failed as he parked the vehicle. Contact noticed that the speedometer provided a reading of 80 MPH instead of 0. On occasions, the speedometer would return to normal but would mainly read between 80-100 MPH erroneously. The vehicle was taken to an independent mechanic where they advised him that a motor in the speedometer failed and needed to be replaced. The vehicle was not repaired nor was the manufacturer contacted. The failure mileage was approximately 43,000. The VIN was unavailable.

Filed May 2, 2011 · Electrical · 66,000 miles · TN

I have a 2004 hummer h2, the entire instrument panel malfunctions. The fuel gauge, speedometer, oil gauges and all. You have no idea how much gas you have and/ or how fast traveling etc.. The vehicle has less than 70,000 miles on it.