2008 Hummer H3 electrical problems

Filed Jul 13, 2025 · Electrical · IN

The pass lock in this vehicle is faulty. On numerous occasions, it has left me unable to start the vehicle, but if you wait 10 minutes each time, it will start again, but it happens all the time. I've seen numerous complaints online and GM needs to do something about it.

Filed May 29, 2024 · Electrical, Engine · TX

The last dealership I went to they advised to come th the dealership but when I got there nobody wasn’t trying to work there instead the said that it was going to be hard to work on it cause nobody work on those cars anymore and then they said they were going to order the part but never call me back for it. Call them but gave me the runaround basically.

Filed Feb 22, 2023 · Electrical, Engine · 1,000 miles · CO

The contact owns a 2008 Hummer H3. The contact stated that the vehicle intermittently failed to start up without warning. The contact stated that after waiting ten minutes the vehicle started. The contact stated that recently the failure had become more frequent. The contact had taken the vehicle to a dealer however, the mechanic was unable to determine the cause of the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 1,000.

Filed Feb 8, 2023 · Electrical · 101,421 miles · NC

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.

Filed Oct 7, 2022 · Electrical · 132,000 miles · TX · fire

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 failure mileage was approximately 132,000.

Filed Oct 10, 2020 · Electrical · 124,000 miles · TN

Security system stops it from cranking and I have to stand outside the vehicle with it locked for 15 minutes so it will reset. Wiring burnt up and I had it replaced and the radio, A/C, and temp gauge still doesn't work

Filed Aug 3, 2020 · Electrical · 109,000 miles · MN

When attempting to start the vehicle, it locks me out for 10 min, I had it happen two times in a row where I couldn't start it for 20 minutes and was late for work. I have been suck in -20 degree weather with my child. This is an on going issue, and there isn't an error code that pops up when I had it checked. This needs to be fixed!! There is no way to tell when it is going to happen, therefore it has made it very unreliable and has put me and my family at risk.

Filed Feb 20, 2020 · Electrical · 100,000 miles · NC

It seems that the h3, and quite a few other gm cars of this era, has a fuel cutoff switch enabled by a security system which reads the car's key. However, it also has a huge history of failing to operate even when the proper key is used by the car's owner. This represents a dangerous flaw in the design of these cars, not in the sense that it careen off the road without warning or the like, but that it's already stranded my wife multiple times in dangerous circumstances. The fix is currently to replace, at a cost of $300 plus, the ignition switch with exactly the same part that's failed, which is to say that it's more than likely to fail again, as nothing has been done to re-engineer the failed system. I believe that gm needs to really fix the problem, rather than shrug this off as an inconvenience, especially when they are not only apprised of the problem (many, many owners have experienced this), they are planning to re-introduce the brand with an electric drive train. The reporting page requests a specific date, but today is one of many times this has happened.

Filed Aug 12, 2019 · Airbags, Electrical · IL

Tl* the contact owns a 2008 hummer h3. The contact received notification of the federal safety agency campaign number: 15v421000 (visibility). The contact stated that the air conditioning module failed and the air bag warning indicator illuminated. The vehicle was taken to rizza cadillac buick gmc (located at 8425 159th st, tinley park, il 60487, (708) 429-6600), where it was diagnosed and repaired. The diagnostic and repair specifics were not disclosed. The failures recurred. The manufacturer was not notified. The failure mileage was unknown.

Filed May 29, 2018 · Electrical, Engine · 80,000 miles · PA

The engine completely shut off while driving on a major highway. The steering wheel locked up and the car came to a stop. Luckily, each time this occurred, I was able to pull over to the shoulder. There were no error lights that came up on both occasions of this happening. The battery continue to die, even after being replaced three times in 6 months!