AI DamageHummer H1: problems, complaints, bulletins
Summary for the Hummer H1 across 4 model years: 7 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
| Year | Owner complaints | involving a crash | Technical service bulletins (TSB) | YouTube repair videos |
|---|---|---|---|---|
| 9999 | 1 | 0 | 0 | 0 |
| 2003 | 4 | 1 | 0 | 0 |
| 2002 | 1 | 0 | 0 | 0 |
| 1999 | 1 | 0 | 0 | 0 |
What fails most often
- 1 Electrical system 14% of all complaints
- 2 Engine and cooling 14% of all complaints
- 3 Exterior lighting 14% of all complaints
- 4 Powertrain 14% of all complaints
- 5 Service brakes 14% of all complaints
- 6 Structure 14% of all complaints
- 7 Tires 14% of all complaints
- 8 Vehicle speed control 14% of all complaints
- Electrical system: 1 complaints (14% of all).
- Engine and cooling: 1 complaints (14% of all).
- Exterior lighting: 1 complaints (14% of all).
- Powertrain: 1 complaints (14% of all).
- Service brakes: 1 complaints (14% of all).
Symptoms owners describe
How many of the 7 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Electrical system | 1 | 0 | 0 |
| Engine and cooling | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Tires | 1 | 1 | 0 |
| Vehicle speed control | 1 | 0 | 0 |
| Visibility | 1 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
I had taken my 2003 h2 hummer to have the front end aligned and 2 new tires placed on the front . I complained to the tire dealership the moment I had driven my vehicle maybe 10 miles of it not driving right . I took my vehicle back to the dealer 3 times with complaints of it not driving right.
2002 hummer h1 has a defect/failure problem with the ac delco accelerator pedal. The consumer stated he is on his third pedal replacement within 2 1/2 years. The consumer stated the issue was rapid acceleration while driving or trying to stop.
Consumer inquired as to why there was not a recall on the defective #8 cylinder of the 1999 hi hummer. The #8 cylinder cracked resulting in total engine failure at 14000 miles.
Abs brake fault light repeatedly comes on. Vehicle returned to dealer (cerritos hummer) seven (7) times for repair and fault continues.
While driving 55 mph vehicle stalled. Vehicle was towed to the dealer for analysis, but mechanic could not resolve the problem.
The brightness of head lamps on both sports utility vehicles and many foreign autos is a continuous hazard. Even when I've moved the rear view mirror to night shade, the outside mirrors blind me. Large vehicles awash the interior of my car as if I were sitting in front of a landing airplane.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.