Electrical complaints by model year
Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
What owners report
Rear window on driver side, cable snapped less than a year ago. It was raining heavy and I had to ride with the window down for 13 hours till I got home. Tonight, it's the 4th of July, took my kids to see fireworks.. Rolled the window down for them to watch, heard a pop. Naturally I was out of town and had to to ride home like that..
ABS /. Traction control. Both lights on at the message center of the dash board. Simultaneously these two light come on and off intermittently. Meaning they come on together, sometimes when I hit a speed bump and then they go out for sometimes 1 month or 4 months each time randomly. Always when the car is moving or in operation.
The contact owns a 2006 Hummer H2. The contact stated while driving and activating the blower motor, the blower motor was intermittently inoperable. The contact stated that an abnormal electrical burning odor was coming from the vehicle. The contact stated that upon activation, the A/C and the heating systems were intermittently inoperable. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the blower motor wiring harness needed to be replaced. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 190,000.
The contact owns a 2006 Hummer H2. The contact stated while driving at undisclosed speeds with the A/C activated, the contact became aware of an abnormal burning electrical odor. No warning lights were illuminated. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the blower motor resistor needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 196,000.
The contact owns a 2005 Hummer H2. The contact stated that while parking in the mountains, the vehicle was in the park position, and it unexpectedly rolled and stopped at a boulder. There were no warning lights illuminated. The door hit the driver and knocked him to the ground, and he sustained an injury to his head, but medical attention was not provided. Another person on an ATV provided a jump start, but the vehicle failed to restart. The contact walked several miles to get assistance. The contact was able to view YouTube and replace the part. The contact stated that the transmission shifter cable had failed. There was a hole in the shaft connected to the transmission to the C clip. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 111,400.
Driving home I began to smell and electrical burning smell. It began very quickly and came and went for about 2 miles. I pulled over and looked and could not see smoke or fire so I continued home. I drove the remaining 4 miles to my home and immediately got my husband to check as the cab had filled with the smell of an electrical fire. He located the area the smell was strongest and then watched as smoke came out. He unbolted the windshield washer fluid tank and the motor on bottom had actually burned, melted and was on the verge of causing some serious damage. The wipers were not being used and had not been touched. This vehicle is equipped with a heater for the fluid.
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.
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.
Related recalls (2)
Electrical system
GM is recalling certain model year 2006-2009 Buick, lucerne; Cadillac dts; Hummer h2; model year 2008-2009 Buick enclave; Cadillac cts; model year 2007-2009 Cadillac escalade, escalade esv, escalade ext; Chevrolet avalanche, silverado, suburban, tahoe; GMC acadia, sierra, yukon, yukon xl; Saturn outlook; and model year 2009…
Remedy: Dealers will permanently disable and remove the heated washer fluid module. An updated page for the owner manual will be provided and inserted in the owner manual to document that the feature has been permanently…
Electrical system
GM is recalling 857,735 my 2006-2008 Buick lucerne; Cadillac dts; Hummer h2; my 2007-2008 Cadillac escalade, escalade esv, escalade ext; Chevrolet avalanche, silverado, suburban, tahoe; GMC acadia, sierra, yukon, yukon xl, Saturn outlook; and my 2008 Buick enclave vehicles equipped with a heated wiper washer fluid system.
Remedy: Dealers will install a wire harness with an in-line fuse free of charge. The recall began on September 12, 2008. Owners May contact Buick at 1-866-608-8080; Cadillac at 1-800-982-2339 or http://www.Cadillac.com;…
NHTSA investigations
Non-crash engine compartment fires
In a letter dated August 27, 2008, general motors corp. (GM) notified NHTSA that it will conduct a safety recall (NHTSA recall number 08v-441) to address a safety relateddefect that can result in engine compartment fire in approximately 850,000 vehicles equipped with a heated windshield washer fluid option.the subject vehicles of this investigation comprise over three-quarters of the recall population.
Non-crash engine compartment fires
In response to an information request letter sent by the office of defects investigation(odi) during preliminary evaluation pe08-010, GM provided odi with 41 allegations of non-crash engine compartment fires including 16 allegations of fires originating with the ignition in the off position.one of the fires was determined to be caused by an arson event.odi has also received 5 reports, 4 of which are of duplicative…
Frequently asked questions
Which Hummer H2 years have electrical problems?
By NHTSA complaints, the 2005 (27), 2003 (24) and 2004 (14) model years. Electrical complaints make up 34% of all complaints for the 2005.
Is there a recall for Hummer H2 electrical problems?
Yes — 2 recalls, including 10V-240 (electrical system, Jun 4, 2010); 08V-441 (electrical system, Aug 28, 2008). Recall repairs are free at authorized dealers; check a specific car with the VIN recall check.
At what mileage do Hummer H2 electrical problems start?
Across all years, half of the complaints with a recorded mileage happened before about 72,000 miles; 34% happened before 50,000 miles.
What part fails most often?
Owners most often name the instrument cluster/panel (10 mentions), followed by the 12v/24v/48v battery (1).
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.