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
My heating and ac blower motor stopped working on a vehicle that has less than 31K miles on it. The estimated repair costs are 500$, not including the tow, being that it is the middle of winter and the closest dealership is 20 miles away. Additionally, the time off of work and ebing without a car for a week. I have heavily researched this issue and it has been reported thousands of times and is a well known issue and GM has not issued a recall. The problem is that a faulty electrical short causes a wiring harness to melt, (smoking) with a burning smell and black residue. This is a major fire hazard and the recommended fix from the dealership only replaces the harness, buy does not address the core issue causing the fire hazard. This is like replacing burnt drywall to address faulty house wiring .
Tl* the contact owns a 2010 Hummer H3. On many occasions, the vehicle would not immediately start and the security indicator illuminated. The vehicle had been serviced for the same failure many times at maritime motors (985 post rd, fairfield, ct). The fuel pump, alternator, and battery were replaced during the repairs, but the failure continued. The cause of the failure was not determined. The manufacturer was notified and provided case number: 95570738708. The failure mileage was 200.
The contact owns a 2009 Hummer H3. The contact stated that the vehicle failed to immediately start, and the security warning light illuminated. After several attempts, the vehicle was started. The contact stated that the failure was intermittent but had become more frequent. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure, but no assistance was provided. The failure mileage was 97,000.
Category: Recall Reimbursement Problem NHTSA Complaint Description I am filing a complaint regarding General Motors' refusal to reimburse an out-of-pocket repair related to Safety Recall N150042 on my 2009 Hummer H3 (VIN: [redacted] ). On December 31, 2025, I paid $946.06 out-of-pocket to correct the defect covered by Recall N150042 (blower motor connector module). The repair was performed at Coleman Buick GMC Cadillac in Lawrenceville, New Jersey. A complete reimbursement package was submitted to GM. GM has denied reimbursement, claiming that this recall was previously repaired in 2016. However: No documentation has been provided to support that claim. No repair order number has been provided. No servicing dealer or repair location has been identified. No proof of recall closure documentation has been produced. No warranty claim record has been provided. …
The contact owns a 2008 Hummer H3. The contact stated that upon shifting into drive (D) or reverse (R) the doors of the vehicle would unlock automatically. There was no warning light illuminated. The contact also stated that upon pressing the power master door lock switch to lock the vehicle, all four doors were unlocked. Additionally, the contact stated after refilling the gas tank at the gas station, the vehicle failed to restart and made an abnormal clicking sound. The contact stated that upon inspecting the hood of the vehicle, he saw flames on the positive side of the battery and the flames extended to the oil stick. The contact was able to extinguish the fire by taping it with a towel. The vehicle failed to start and remained at the gas station. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. …
The contact owns a 2008 Hummer H3. The contact stated that the vehicle failed to start. The anti-theft system warning light illuminated. The contact waited 10 minutes for the vehicle to reset, per the vehicle Owner's Manual instruction. The contact was able to drive the vehicle. The contact stated that the failure reoccurred increasingly several times per day. Additionally, the vehicle had taken 45 to 90 minutes to reset and restart. The vehicle was towed to an independent mechanic on two occasions; however, the mechanic was unable to duplicate the failure as the vehicle would restart as needed while at the dealer. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 101,421.
The contact owned a 2007 Hummer H3. The contact stated that while the vehicle was parked, the AC was turned on, and the contact became aware of smoke entering the cabin of the vehicle. The smoke was coming from the front passenger's side underneath the dashboard. The AC was turned off, and the smoke ceased. The contact exited the vehicle and went into the store. The contact exited the store and was informed by a shopper that the vehicle was on fire. The vehicle was unoccupied. The fire was coming from underneath the hood of the vehicle. The Fire Department arrived on the scene and extinguished the fire. The Fire Inspector informed the contact that the fire was a thermal event related to HVAC wiring. In addition, the contact was informed of an unknown recall; however, the VIN was not associated with a recall related to the failure. The vehicle was destroyed. …
Odometer Fraud. The contact purchased a 2007 Hummer H3. The contact discovered that there was a mileage discrepancy. The vehicle was an independent dealer sale. At the time of purchase, the vehicle mileage was 122,791 and at the time of registration, it was discovered that the mileage was 122,799 but additional documents also showed that the mileage was unchanged over a 3-year period.
Frequently asked questions
Which Hummer H3 years have electrical problems?
By NHTSA complaints, the 2006 (96), 2007 (76), 2008 (34) and 2009 (34) model years. Electrical complaints make up 27% of all complaints for the 2006.
Is there a recall for Hummer H3 electrical problems?
No. NHTSA lists no electrical system recall for any Hummer H3 model year. A widespread problem may still be covered by an extended warranty or a manufacturer service bulletin, so ask a dealer.
At what mileage do Hummer H3 electrical problems start?
Across all years, half of the complaints with a recorded mileage happened before about 86,000 miles; 17% happened before 50,000 miles.
What part fails most often?
Owners most often name the wiring › interior/under dash (4 mentions), followed by the wiring (3).
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.