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NHTSA — Electrical System Problems


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
60,312 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Hummer H2 electrical problems

electrical problem

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2004 Hummer H2 Owner Comments

problem #6

Sep 192016


  • miles


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..

- Jacksonville, FL, USA

problem #5

Mar 012014

H2 8-cyl

  • 113,784 miles
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.

- New Market, TN, USA

problem #4

May 112012

H2 8-cyl

  • 98,720 miles
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.

- Cumming, GA, USA

problem #3

Apr 022012


  • 43,000 miles


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.

- Waterberry, CT, USA

problem #2

Sep 052010


  • 66,000 miles
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.

- Covington, TN, USA

problem #1

Oct 152006

H2 8-cyl

  • Automatic transmission
  • 40,370 miles
2004 Hummer H2 speedometer quit functioning completely the started working again but very erratically, reading improper speeds at all speeds including registering 60 mph while at a stop. Problem has been occurring since 10/15/06. Not a safe situation.

- Chicago, IL, USA

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