2007 Hummer H3 electrical problems

Filed Jul 2, 2026 · Electrical · 197,000 miles · CT · fire

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. The charred remains of the vehicle were towed to a local tow yard. A Police report was filed. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 197,000.

Filed Jun 4, 2025 · Electrical · 122,799 miles · FL

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.

Filed Apr 14, 2021 · Electrical · 117,000 miles · WI

Ignition switch stays on with key off and out and alarm goes off sometimes just sitting and battery goes dead

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

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

Filed Feb 9, 2019 · Driver assistance, Electrical · KY

Hello,my name is [xxx],and we are having the same issues as many seem to be having as we just seen on google and more,got in the hummer this morning started up fine,stopped at gas station for a drink on way to work,went back to car and it would not start,after several tries it finally did,making me late for work. Have had the 2007 hummer h3 for maybe 4 days!!! And already having issues? Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Sep 18, 2018 · Electrical · 134,565 miles · MI

Tl* the contact owns a 2007 hummer h3. While driving 45-50 MPH, the vehicle stalled without warning and all the electrical functions failed to operate. The contact was able to restart the vehicle after approximately three minutes. The vehicle was not taken to be diagnosed or repaired. The dealer and manufacturer were not contacted. The approximate failure mileage was 134,565.

Filed Aug 22, 2018 · Electrical · 120,000 miles · CA

Passlock issues not allowing the vehicle to start. Wait 10min with multiple attempts.

Filed Aug 22, 2018 · Electrical · 135,000 miles · FL

I don't know why I have to wait 10 min.before the truck will start this is crazy and no one wants to fix the issue.I have had it to 2 different dealers and they say its all the hummer h3s that this problem is in the computer and will cost me over $800 to fix thats crazy this should be put for recall not good business I have children that if theres an emergancy my hummer wont start. Really gm get it together this happenes all the time and half the time I have to wait 20 to 30 min for it to start

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