NHTSA — Electrical System Problems

2007 Hummer H3 (Page 2 of 3)


really awful
Crashes / Fires:
1 / 9
Injuries / Deaths:
0 / 0
Average Mileage:
67,358 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 2 of 3)

« Read the previous 20 complaints

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

problem #27

Nov 132013


  • 85,000 miles
The contact owns a 2007 Hummer H3. The contact stated that the vehicle failed to start and the security warning light illuminated. The vehicle was taken to an independent mechanic where the technician was unable to determine the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 85,000.

- Keller, TX, USA

problem #26

Oct 242013


  • 100,000 miles
The contact owns a 2007 Hummer H3. The contact stated while attempting to start the vehicle, the pass lock disabling system light illuminated and prevented the vehicle from being started. The contact had to wait approximately 10 minutes for the vehicle to successfully restart. The vehicle was taken to the dealer for diagnostic testing. The technician was unable to duplicate or diagnose the failure. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 100,000.

- Albany , GA, USA

problem #25

Jul 092014

H3 5-cyl

  • 79,000 miles


I have a 2007 H3 Hummer with 81000 miles. This past summer I got into my truck and put on my air conditioning on high. Nothing came out of the vents. Blower motor wouldn't even move. I did some research on the topic and it all lead to a burnt out blower motor resister. I had purchased a new one and replaced it to find out that there was a small fire in the plug from it getting to hot. This is a common problem with the H3. I talked to GM safety and they won't do anything and bout it because it's out of warranty due to age and miles. There is no reason for this not to be a recall issue. No blower motor means no defrost on your windshield. Due to cold winters in New York you need the defrost. Now my trucks blower motor works when it wants to due to faulty wire harness in truck. I have pictures of the plug and old resister. Thank you

- North Tonawanda, NY, USA

problem #24

Oct 112014

H3 5-cyl

  • 85,400 miles
Air blower for air conditioning and heater stopped working because melted plastic on resistor also fried wiring and harness needed to be replaced.

- Alexandria, VA, USA

problem #23

Aug 262014

H3 5-cyl

  • 64,000 miles
My son was driving his 2007 Hummer H3 when it caught on fire. It was an electrical fire started on the passenger side in the dash. He didn't know it was on fire until he got out of the car to go into a restaurant. He didn't even smell anything burning and had only been driving around 5 minutes. People were pointing at his car telling him it was on fire. The local fire department got to him in 3-4 minutes. The Hummer H3 was totaled out because of the fire. The car had approximately 64,000 miles on it and was in excellent condition.

- Prestonsburg, KY, USA

problem #22

Jul 012014

H3 5-cyl

  • 60,000 miles
Just had my Hummer in 2 weeks ago at the GM dealership to have the ignition switch replaced. Had been dealing with it stranding me and my kids for 10 minute periods long enough. ( sometimes longer) while it was in there we also had to get the radiator replaced due to it being cracked. Now 2 weeks later my check engine light and traction light have come on. The traction light saying service sab system. After reading all the Hummer problems I can not believe that there was not a recall on both the ignition switch and radiator. The ignition switch being faulty put me and my kids in situations in places for long periods of time that were not safe and at times we were very cold since we can have below zero weather in Colorado. The ignition not recognizing the key causing the anti theft system to activate is recall issue and GM you should be taking responsibility for this!!

- Ault, CO, USA

problem #21

Jan 032011


  • 40,000 miles
The contact owns a 2007 Hummer H3. The contact stated that whenever the air conditioner or heater was turn on, burning wire fumes would emit into the vehicle. The vehicle was taken to the dealer. The technician diagnosed that resistor needed to be replaced. The vehicle was repaired but the failure recurred. The vehicle was taken back to the dealer who replaced the blower and the wire harness that had melted. The failure recurred. The manufacturer was not notified of the issue. The approximate failure mileage was 40,000.

- Crestview, FL, USA

problem #20

Jan 142014

H3 5-cyl

  • 115,000 miles
Continuous problems with vehicle shutting down and or not starting with faulty passlock II system............. owners manual says to wait 10-15 min but keeps happening intermittently 4 times on 9-9-14 problem is worsening by the week.

- Key Largo, FL, USA

problem #19

Aug 092014


  • 119,000 miles
The contact owns a 2007 Hummer H3. The contact stated while traveling approximately 25 mph, the vehicle stalled. The contact was not able to restart the vehicle. The vehicle was towed to an authorized dealer. The technician diagnosed that the PCM needed to be replaced. The vehicle was repaired. In addition, the key became lodged in the ignition causing the battery to drain. The vehicle was taken back to an authorized dealer who diagnosed that the shifter needed to be replaced. The manufacturer was notified of the failure. The approximate failure mileage was 119,000.

- Columbia, SC, USA

problem #18

Aug 092014

H3 5-cyl

  • 119,400 miles
Was driving in a small town and the vehicle just lost all power with no warning. It cost me over $600 to get repaired and I'm thankful I was not on the highway going 60 or 70 and I'm thankful there was no vehicles behind me. Also the key won't come out of the ignition after I drive it for a while and this wears down my battery and I have to get a jump. Has there been any recalls or other complaints about these problems.

- Columbia, SC, USA

problem #17

Jul 102014

H3 5-cyl

  • 145,000 miles
Fan blower resistor burnt up and melted wiring harness electrical seat button that controls position and heat turns on due to the side plastic seat molding that flexes when you sit in the seat.

- Fairview, TX, USA

problem #16

Jul 012010

H3 5-cyl

  • 26,000 miles
My car began show the passlock disabling system light and then failing to start. After starting, it would then show the air bag warning lights for a period that might be several minutes to several days before going out again. This cycle happened at random times disabling the auto without warning and in some dangerous situations. It is a well known and publicized problem that GM has chosen to ignore. I have solved the problem by having passlock disabled and ignoring the air bag warning light with the assumption it is a false warning. These recent events have me reconsidering that action, but the cost of having the problem rectified would be more than I could afford.

- Creedmoor, NC, USA

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