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.
Engine & cooling
2004 Hummer H2 Engine problems
Owners have filed 3 complaints about the 2004 Hummer H2's engine & cooling with NHTSA - 5% of all its complaints, most recently on February 22, 2022. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
- Complaints
- 3
- Recalls
- 0
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Engine complaints
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.
I own a 2004 hummer h-2, no alterations to the engine, drive train, or chassis. While driving the vehicle will stall. This vehicle will just shut off at freeway speed. I took it to the dealership after the last event only to be told the following day that the truck is fine and not stalling. *Tr
Hummer H2 engine complaints by year
H2 engine problems, every yearSource: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data