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NHTSA — Electrical System Problems

2007 Hummer H3 (Page 1 of 3)


really awful
Crashes / Fires:
1 / 8
Injuries / Deaths:
0 / 0
Average Mileage:
70,923 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2007 Hummer H3 electrical problems

electrical problem

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2007 Hummer H3 Owner Comments (Page 1 of 3)

problem #47

Mar 182016


  • 98,000 miles


The contact owns a 2007 Hummer H3. While the vehicle was parked with the engine off, the radio turned on independently. The failure recurred intermittently. The vehicle was not diagnosed nor repaired. The manufacturer was not notified of the failure. The failure mileage was 98,000.

- New Orleans, LA, USA

problem #46

Aug 222014


  • 87,000 miles
I keep getting a code that states that my truck runs with a low engine temperature. Plus my truck has had a leak from some where around the lower windshield that is causing electrical problems and soaking wet floors! we had a mechanic look for the leak and try to fix this issue but was unable to find the problem and we were also told by a few dealership that they have seen a lot of H3 Hummer with the same problem! also we are having issues that causes the traction signal to come on regularly and it causes my truck to lock up. It has almost caused us to wreck several times! it's very scary to drive my Hummer! every time we have any of these problems we are always in motion and it's always on the highway when we are driving at higher speeds. It never seems to happen while driving around town!! this has been continuing going on ever since we purchased this vehicle in August 2014

- Sulphur, LA, USA

problem #45

Aug 122015


  • 48,000 miles
I received an important safety recall letter from Hummer (GM) in August 2015 for my 2007 Hummer H3. It is safety recall 15042. The letter indicated that it was a safety recall stating the connector module that controls the blower motor speed in the heat/vent/air conditioning (HVAC) system may overheat under extended operational periods at high and medium-high blower speeds. If this condition occurs there could be a risk of fire. The letter said parts weren't available and when they were I would be contacted to arrange a service appoint. After several months and no call, I contacted the number, 1-800-833-6537, and asked what the hold-up is on the parts? I was told the parts were still unavailable. After several more months, I called again only to receive the same excuse with no projected date of arrival. To me this unacceptable especially this recall involves a potential risk of a fire. It is now March 2016 and I have not been contacted. I find it hard to believe that it takes so long to obtain replacements. I am hesitant to use the blower motor because of the potential fire risk.

- Leavenworth, KS, USA

problem #44

Aug 102015


  • miles


The contact owns a 2007 Hummer H3. The contact stated that the vent control functions for the ac/heater failed to operate without warning. The vehicle was not diagnosed or repaired. The contact later received notification of NHTSA campaign number: 15V421000 (visibility) and 10V179000 (structure) but the parts were not available to receive the recall repairs. The manufacturer was notified of the failure. The failure mileage was not available. Parts distribution disconnect.

- Brooklyn, NY, USA

problem #43

Feb 052016


  • 120,000 miles
The radiator has a crack in it which is a very common issue...needs to be recalled. My H3 was idling rough and would shut off. Had to replace throttle body and solenoid. The anti-theft acts up and the H3 won't start have to wait 10 minutes. The ac blower and connector burnt paid for it to get fixed then the recall comes out 7 days later....still haven't been refunded for that. I have all the issues on my 2007 H3 that should all be recalled and fixed at GM expense. Sunroof drains get clogged all the time and have water leak onto the floor which makes the ABS light trigger on and off. Issue after issue which GM doesn't take any responsibility for. It looks like it's time to sell the Hummer H3!!

- Tallahassee, FL, USA

problem #42

Jan 112016


  • 111,000 miles
The contact owns a 2007 Hummer H3. While driving approximately 60 mph, the contact smelled burning plastic. The vehicle became filled with the odor. The dealer diagnosed that the connector model, blower switch, and HVAC unit melted and needed to be replaced. The manufacturer was notified. The approximate failure mileage was 111,000.

- Amarillo, TX, USA

problem #41

Jun 012014


  • miles


After reading all if these complaints I decided to write mine. Probably about a little over a year ago the first thing that started was my tpm sensor would come on and then go off I took it to the tire store and they said this could be going bad ok well then it stopped, next I got into my vehicle from grocery shopping and my car would not start in the hot summer in my vehicle ( thank god my 2 young kids weren't with me) after several attempts it finally started, this happens a lot more then once until one day when it was freezing cold outside in wonderful Wyoming my key would not come out of the ignition, I had to unplug my battery until I could take it to the shop ! then after I get my car back a few days later my blower to my heater quit working for a few minutes and then I smelled a burning smell, I called the repair shop again to take it back and there was a charred wire and they had to replace what was being recalled.( I received the 1st letter about 6 months later), which I still haven't received a 2nd letter! now I'm starting to have a issue of my car dying when I'm slowing down to stop at a stop sign or to turn!!! I happened to get on her and read all the complaints and nothing has been done!!! I have 2 small children and this is absolutely disturbing, I am really regretting not getting rid of this vehicle last year!! I beg that you all please look into these, before someone dies or anything else!! ( it shouldn't even get to that point). I had about 70,000 miles when this all started and noe I have 84,999. My mph was 0-30 !!!

- Casper, WY, USA

problem #40

Mar 102014


  • 40,000 miles
The contact owns a 2007 Hummer H3. The contact stated that the key failed to turn in order to start the vehicle. In addition, the vehicle stalled. The vehicle was taken to the dealer more than five times and the repairs did not remedy the failures. The details were not available. The vehicle was taken back to the dealer where the vehicle was pending a diagnosis. The manufacturer was notified of the failures. The VIN was not available. The approximate failure mileage was 40,000.

- Streamwood, IL, USA

problem #39

Jul 012015


  • miles
The contact owns a 2007 Hummer H3. The contact stated that when the vehicle was started, the heater and defroster were inoperable. The contact also stated that the air conditioner failed. The failure occurred each time the vehicle was driven. The contact received notification of NHTSA campaign number: 15V421000 (visibility) however, the part to do the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The approximate failure mileage was 85,000. The VIN was not available. VIN tool confirms parts not available.

- Louisville, KY, USA

problem #38

Nov 142015


  • 134,000 miles
Went out to start Hummer would not start it turns over but will not start waited a few minutes and it started up with no issue so decided to go ahead about my day driving on the freeway and the truck cuts off while driving on the free way I was terrified was close to an exit got off and restarted the car no issues this has happened to many times and is dangerous I have children and this needs to be looked into do not know if it is the ignition or the alarm system sending the wrong signal please help I'm to the point of going to find a new vehicle because I D not feel the Hummer is safe please help before something bad happens please

- Pontiac, MI, USA

problem #37

Nov 042015


  • 72,000 miles


The car wouldnt start because the passlock system engages and then you have to wait 10 min for it to reset, then it will start. The vehicle was in park and off.

- Lake Orion, MI, USA

problem #36

Apr 102015


  • 90,000 miles
I've had electrical concerning the factory and after market alarm system that the dealer influenced me to buy. I've had some sort of short causing to have it towed to dealer several times, I never got a complete understanding or reasoning for the problem. Now my air condition blower stopped working and I was not informed of the recall for my car from the manufacturer or the dealer. After contacting dealer that I bought the car from was informed that there wasn't a fix for the problem

- Lake Jackson, TX, USA

problem #35

Oct 092015


  • 125,000 miles
Our 2007 Hummer H3's air conditioning stopped working in may, 2014. We took it to our mechanic and they found burned/melted wires and components related to the blower relay. They replaced parts and wires to return the A/C to working order. Recently, we received the recall notice related to this hazard, but GM doesn't have a solution yet. Today, the selector on the A/C has stopped working. We have a serious concern that wires and components might be burning again. We have stopped driving the car. How can GM get away with this dangerous hazard and not fix our car" I see so many complaints on this website related to this issue. What other Agency of the government can influence the car manufacturer to remedy this potentially-deadly defect"

- Chandler, AZ, USA

problem #34

Jul 032015


  • 3,540 miles
3-4 months ago my A/C unit started making a loud noise with a burning smell when I would put my A/C switch on level 3 or 4. it would sound like if my A/C unit was going to blow up. The next day I received a recall letter from the Hummer company descriving the same symptoms my H3 A/C unit is having.I called the Hummer company and asked them how long is going to take for them to fix this problem they stated in a very rude manner that they will fix it when ever they get the part. This is the worst experience ever I. I asked them if it can take more than a year and they responded we do not know. I got very upset because its not fair that I spend a lot of my money to buy my H3 and if its a recall why they dont help me to fix my problem, I explain to them that the weather in Texas is very hot and I been without A/C since and they dont care. This is not fair please help me out. I dont even know what to do anymore, please advise. Help!!!!!!!!

- Dallas, TX, USA

problem #33

Aug 312015


  • 91,000 miles
Today I am reaching out to you for your help. This letter is in reference to the GM recall on the Hummer H3 A/C module resistor that was issued in July of 2015. My wife and I have reached out to GM on multiple occasions with no resolution in site. I ask that the NHTSA demand GM establish a timeline for the completion of a corrected part and that GM provide an adequate alternative option to GM customers faced with this issue until the part is available. My concern is over my well-being as well as my families. On Monday August 31, 2015, I was driving home from work when I noticed a burning smell coming from underneath my glove box. After I pulled over and examined closer I could see the issue was from the A/C module resister that was recently recalled. The resister had burned through part of the harness attachment. Upon reaching out to GM, they stated I only had two courses of action: 1) to replace the part with another faulty part (which I would have to pay for) and hope that the part does not short / catch fire before they are able to come out with the corrected part (which would be free). 2) wait for a corrected part to become available. The main issues with the second option are that GM has no timeline for the completion/availability of the corrected ac module resistor (customer service said anywhere from 1 month to multiple years). This would leave the customer (without heat or A/C) for an extended period of time. My current work commute totals 2 hours every day. Where I live this becomes problematic due to severe summer / winter climates (as I write to you there are heat warnings in effect). GM has known about this issue since 2009, yet they failed to act. Now the consumer is forced to face the consequences of their ill planning and neglect while GM continues to act inept. Please help GM realize that GM customer lives matter.

- Palmer, PA, USA

problem #32

Oct 302010


  • 65,000 miles
The contact owns a 2007 Hummer H3. The contact stated that when the key was in the ignition and turned to the on position, the pass lock warning light illuminated and the engine failed to start. After 15 minutes, the contact was able to restart the engine. The vehicle was taken to a dealer, who diagnosed that the theft deterrence system failed. The vehicle was repaired several times, but the failure persisted. The manufacturer was not made aware of the failure. The approximate failure mileage was 65,000.

- Rosedale, IN, USA

problem #31

May 022015


  • 92,000 miles
No air was coming out of vents, found the problem was faulty wiring with the resistor and wire harness blower motor both were burnt and smell of something burning.

- Vestal, NY, USA

problem #30

Sep 132013


  • 65,000 miles
Vehicle would not start called dealership where car was purchased - replaced ignition switch after diagnosis. Since then have had repeated episodes of vehicle ignition/electrical just shutting completely down on different occasions. I could be sitting or approaching a stop light vehicle shuts down upon taking off or idling down, vehicle also shuts down when making turns as well. It occurs so infrequently and has no pattern but it is indeed a safety concern because I have to put on the flashers and take time to restart the engine all before someone runs into me.

- Raleigh, NC, USA

problem #29

Feb 022015


  • 66,790 miles
Engine check light came on for very short period of time then went out. About a week later it came on again. Went to Chevy dealer who ran a quick code check which indicated the number 5 cylinder was misfiring. The Chevy dealer indicated the engine/power train warrranty had expired and the problem could be from injectors, plugs, coil and valves. Initial computer check would cost $135. Vehicle is sitting in my garage awaiting money to get it checked.

- Fairfield, CA, USA

problem #28

Feb 142015

H3 5-cyl

  • 70,000 miles
The HVAC blower motor resistor connector located under the glove box was burnt, the red plastic on the harness was melted. The reason I became aware of this is because the blower quit working. I looked this up online and found it is a common issue. I feel anytime you have the potential for a fire there should be a recall. I feel it is fair to assume the new resistor and wiring harness will do the same thing since it is the exact same design.

- Massillon, OH, USA

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