2007 Hummer H3 engine problems

Filed Jun 21, 2021 · Engine, Visibility · 160,000 miles · TX

The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to the battery needing to be replaced. The vehicle was not repaired. The contact had the vehicle serviced under the federal safety agency campaign number: 15V421000 (Visibility) prior to experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 160,000.

Filed Feb 2, 2021 · Electrical, Engine · 110,000 miles · TX · fire

On 3/13/2020 my wife was driving our 2007 hummer h3 when the engine compartment and dash area caught on fire. The blower motor connector module had been replaced recently as part of a safety recall. The vehicle was in motion and she had just made a left turn. Although the part had been replaced, I still believe that this recall issue was the cause of said fire. The fire department called it an electrical issue. There was no warning at all. This was traumatic for my wife she had to jump out of the vehicle and had a miscarriage.

Filed Jan 16, 2021 · Engine · 95,000 miles · CA

Vehicle misfires frequently. Engine will nearly stall at idle due to misfires and shake the whole vehicle. Lack of power and efficiency. And juddering while accelerating. It is known to gm and many people have had to resort to cylinder head replacements costing hundreds at a minimum.

Filed Aug 8, 2020 · Electrical, Engine · 179,000 miles · WA

Oil light comes on when idle. Truck loses pressure. No dealership solution.

Filed Dec 30, 2019 · Engine, Fuel system · 120,000 miles · WA

Tl* the contact owns a 2007 hummer h3. While driving 35 MPH, the engine oil indicator illuminated and an odor emitted from the vehicle. The contact replaced the oil and took the vehicle to an independent mechanic where it was discovered that there was a small hole in the manifold, which burned out the oil. The contact paid out of pocket to have the vehicle repaired. The manufacturer was notified and filed a claim. The contact was referred to the federal safety agency to file a complaint. The dealer was not contacted. The failure mileage was 120,000.

Filed Dec 15, 2019 · Engine · 160,000 miles · NH

Driving down the road and it stop and it would not start engine lock up

Filed Aug 22, 2019 · Engine · 84,822 miles · UT

Tl* the contact owns a 2007 hummer h3. The contact stated that the engine failed to start. The contact had to sit in the vehicle and wait a while before attempting to start the vehicle. The failure occurred at any given moment and was becoming more frequent. In addition, the pass lock warning indicator illuminated on the instrument panel. The dealer was not contacted. The manufacturer was made aware of the failure. The contact replaced the manifold and was reimbursed. The failure mileage was 84,822. The VIN was unknown.

Filed Apr 5, 2019 · Engine · 123,000 miles · TN

Hummer will not start, engine turns over normally, but will not start. Wait exactly 10 minutes and it starts up fine. Can happen any time, at the gas station, first thing in the morning. Learned that if the security light on the dash blinks when the key is turned on, the vehicle will not start. If light stays on, the vehicle starts. Have watched for this at every start up, can now tell when the vehicle won't start. This is a major problem with gm vehicles with pass lock since the late 1990s, gm need to take responsibility for this problem now!!!!!!!!!!

Filed Dec 15, 2018 · Engine · 97,000 miles · NC

If returning soon after shut off ; it will not restart. Have to wait awhile for it to restart. It's weird because there are no other problems. It has been doing this for awhile now.

Filed Jun 21, 2018 · Electrical, Engine · 105,000 miles · PA

Sir/ma'am, I am writing to complain about the 2007 hummer h3 security system not allowing the vehicle to start under certain conditions. I maintain my vehicle to high standards and over the last 8 months have had issues starting my hummer. When the hummer does not start, you must wait 10-15 minutes to even attempt to restart. The vehicle will turn over, but no fuel is sent to the engine to start. If it doesn't start again, you must wait another 10-15 minutes. The latter has happened to me 5 or 6 times in just the last 2 months. There have been numerous complaints to gm about this exact issue, and has fallen on deaf ears. Many vehicle forum users complain of the exact issue as well, with zero assistance from gm as seen here: https://www.cargurus.com/cars/discussion-c8039_ds531571 I am concerned that if the sporadic security lockdown (passlock) occurs while driving, fuel is cut off from the running engine, speed/steering/braking will be minimized, and the possibility of a crash is increased exponentially. Please advise gm there needs to be a fix for this and ensure they comply! Thank you for your time. I believe my photos of the blower motor fan resistor being burnt helped get gm issue a recall, and I hope this will urge them to fix as well