2004 Hummer H2: common problems and reliability

The 2004 Hummer H2 has 59 owner-filed NHTSA complaints and 4 recalls on record. The most-reported areas are electrical system and service brakes. Owners most often flag electrical system failures — encompassing parasitic battery drain, malfunctioning body control modules (bcm), door control modules, window regulators, dome lights, dash clusters, and stereo systems. problems often manifest as multiple simultaneous failures. frequency: very frequent.

Safety record for the 2004 model year

59
Owner complaints
4
Recalls
6
Crash reports
1
Fire reports

Source: NHTSA complaints and recalls filed for 2004 Hummer H2 vehicles (US, public record).

Where owners report problems

electrical system
14
service brakes
14
visibility
10
hydraulic
6
steering
6

Recalls affecting the 2004 H2

service brakes, hydraulic

Campaign 05V043000

CERTAIN TRUCKS, SPORT UTILITY VEHICLES, AND VANS EQUIPPED WITH BOSCH HYDRO-BOOST BRAKE ASSEMBLIES, THE HYDRAULIC BRAKE BOOSTER PRESSURE ACCUMULATOR MAY CRACK AND SEPARATE FROM THE HYDRO-BOOST ASSEMBLY DURING NORMAL OPERA…

seat belts:rear/other

Campaign 05V163000

ON CERTAIN CREW CAB PICKUP TRUCKS AND SPORT UTILITY VEHICLES, THE 2ND ROW CENTER OCCUPANT SEAT BELT ROUTING MAY MAKE IT DIFFICULT TO POSITION THE LAP PORTION OF THE SAFETY BELT LOW AROUND THE HIPS OF OCCUPANTS, ESPECIALL…

steering

Campaign 06E010000

CERTAIN FABTECH AFTERMARKET REPLACEMENT PITMAN ARMS, P/NOS. FTS71000 AND FTS71001, INSTALLED FOR USE ON CERTAIN 2001-2006 GM C/K 2500 PICK UP TRUCKS AND SPORT UTILITY VEHICLES. THE PIN LOCATED INSIDE THE PITMAN ARM CAN S…

service brakes, hydraulic

Campaign 04V045000

CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 135, ?PASSENGER CAR BRAKE SYSTEMS.? SOME OF THESE VEHICLES WERE PRODUCED…

What owners say across generations

Sentiment is deeply polarized, split between strong affection for the vehicle's character and significant frustration with its ownership costs and reliability. Long-term owners express a passionate, almost irrational love for the H2's imposing presence, comfor

  • Electrical system failures — encompassing parasitic battery drain, malfunctioning body control modules (BCM), door control modules, window regulators, dome lights, dash clusters, and stereo systems. Problems often manifest as multiple simultaneous failures. Frequency: very frequent.
  • Excessive fuel consumption — consistently reported at 10 mpg or less in real-world use. Frequency: very frequent.
  • Costly and frequent repairs — owners report constant visits to the dealership costing at least $1,000 per incident, with major repairs like transmission failure cited at $8,000. Frequency: very frequent.
  • Four-wheel drive system malfunctions — issues with the transfer case and encoder motor, causing the vehicle to be stuck in 4HI or preventing proper engagement of AWD "highway" mode, leading to binding and tire barking during turns. Frequency: recurrent.
  • Poor interior material quality — cheap plastics that self-destruct, a common issue noted for GM vehicles of the era. Frequency: recurrent.

Owner insights cover all generations of the H2.

Other H2 model years

2007 H2
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