2007 Hummer H3 fuel system problems

Filed Sep 7, 2022 · Fuel system · MI

I have the well known issue with the passkey security system. Nothing is wrong mechanically with the car but the security system will not allow the truck to start, therefore leaving me randomly leaving me stranded. Much has been documented on this issue, yet gm has never done a recall.

Filed Nov 16, 2021 · Fuel system · LA

I bought my 2007 hummerh3 used w/124,000 miles. I've had it a month and already had it in mechanic shop due to not starting. The mechanic thought it was a fuel relay and charged me 258.00 parts/labor/tow. Today 11-16-21, only a day after I got it back, it stopped on me again!! Just had it towed again. Just learning that this is a common problem! Is anything being done to rectify this problem?

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 19, 2019 · Fuel system · 135,000 miles · GA

Went out to start h3, turned key, check engine light came on, the battery light came on and the anti-theft system light came on. Passlock/security system inside the steering column is bad. Car won't start. Is unsafe and will strand owner without warning by not starting. Goes into security mode. Was told to wait 10 min and try again. Can't turn it off at gas pump for fear of it locking me out and not starting. I had this happen to me 4 times in one day. So many complaints all over the internet and people trying to fix this issue. There is even a company selling a part to bypass this and the security system which again is another issue. Gm is clearly aware of this issue. This needs to be recalled. Stranding people can be very dangerous. If there is an emergency and the car won't start. All around bad business by gm for not issuing this recall. This has nothing to do with mileage which gm manager said on the phone. These h3's are know from this fresh off the dealership floor. People are being forced to take it to a dealership for repair and replacing the part when the labor costs more than the part. Seem like a monopoly for gm and its dealerships. I have seen anywhere from 1500-2000.00 to install and rectify this bad part at the gm dealerships.

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

Filed Jan 18, 2016 · Driver assistance, Electrical · WY

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 !!!

Filed Jan 17, 2016 · Fuel system · 84,995 miles · WY

When I slow down to stop at a stop sign or slow down to turn my vehicle has been dying.

Filed Oct 2, 2015 · Fuel system · 97,000 miles · FL

Our 2007 h3 had cracked radiator with hose leaking coolant causing the overheating. We have never driven the vehicle off-roading and no warning light was displayed for this issue. Instead, we brought it in for a different issue with the fuel line and discovered the cracked radiator, which could have caused a bigger problem if it had gone undiscovered for longer period of time.

Filed Oct 7, 2014 · Electrical, Engine · 60,000 miles · CO

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!!

Filed Feb 8, 2014 · Engine, Fuel system · 77,540 miles · TX

Smelled radiator fluent when I parked into the drive way, popped the hood and saw that the liquid splashed all over the engine and parts as well as on top of the plastic fan cover, which seemed odd. Couldn't find the leak in the hose. Looked at the hummer forum that I'm a member of and lord behold there was a big topic of radiators cracking and breaking in the same places with the 2007 models. No recall has been issued, so no recall has been submitted. But it's a well known defective radiator problem that gm knows about but won't recall. So they decided to make a new radiator that fixes the problem for the 2007 hummers. The problem is the middle pin that holds the radiator rubs the neck and starts a cracked under the styrofoam, thus the right drivers side cracks in the same spot as well on the plastic side. Hundreds of h3 owners had this happen to them and post pics and what not, but still no recall. This problem is ongoing and nothing is being done. I have spoke to the hummer customer service and they contacted the local gm and they scheduled my scheduled date to take my h3 in feb 17 2014, @ 8 am at the local gm dealership and hopefully they will fix this issue and not charged me to fix due to the fact that they know the problem and have done nothing to fix it. But it's been know that they will not fix the radiator and they say it's due to climate which is false because every h3 owner has it break in the same place, and have submitted countless tickets.