2007 Hummer H3: check engine light

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 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 Mar 8, 2018 · Engine · 136,000 miles · FL

Tl* the contact owns a 2007 hummer h3. While driving various speeds and approaching a stop, the vehicle overheated. The check engine warning indicator illuminated. The contact coasted to the side of the road, powered off the vehicle, and waited for a few minutes to restart it and resume driving. The vehicle was taken to stingray chevrolet bartow (1475 w main st, bartow, fl 33830, (863) 800-9999) where it was diagnosed that the speed sensor failed and needed to be replaced. The vehicle was not repaired. The vehicle was later taken to an independent mechanic where the thermostat was replaced; however, the failure recurred. The manufacturer was not contacted. The approximate failure mileage was 136,000.

Filed Apr 6, 2016 · Driver assistance, Engine · 110,488 miles · IL

Bought 2007 hummer h3 at the end of february as is in chicago at net motor cars addison illinois for 14000 and drove it home 150 miles away and was told by dealer to take it in to gm dealer and have my ABS system flashed by them and all warning lights will go away gm poages had my car for two weeks cost 560 dollars to repair then a day later check engine light came on took it to a shop and they said if gm had it checking for codes they should have seen the wire if they had it on machine looking for codes because that wire had to be in place to read the codes so he told me to take it back to them to repair it for free. I told him no for him to go ahead and fix it for a hundred because if I take it back to gm poage what other trick do they have up there sleve if they fix it. So he did and it showed multiple misfires and a steady misfire on cylinder 5 told them to fix it costing 1929.90 car has been in two different shops two weeks at the gm dealer poage auto mall in decatur illinois very disappointed on there behavior of being shady if they had it hooked up for two weeks on a code reader why didn't they see misfires. Will never do business with them ever they lost a 2000 dollar job and my future services like changing oil ect. This is bad business. Getting my car this week from south shores audo which will have my business in the future. Gm or at least decatur poages auto mall should be investigated by trying to screw over a woman and who else they can they pulled wire so I would bring back to get radio replaced as I was because I only had so much money to replace I think when I was going to bring back in for a refurbished trade in radio they were going to install it then hook wire back up and surprise me with the misfires and a probably 3000 dollar job. Also south shores auto told me nothing wrong with radio

Filed Dec 7, 2015 · Engine, Transmission · 94,000 miles · TX

Rebuilt transmission twice cleaned throttle body replaced exhaust manifold two o2 sensors replaced the radiator the heater core a fuel pump relay and this engine light still will not turn off it says torque converter clutch solenoid I'm disgusted already gm fix ur [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Oct 7, 2015 · Engine · 140,000 miles · NC

Tl* the contact owns a 2007 hummer h3. The contact stated that the check engine warning light illuminated. The contact received notification of the federal safety agency campaign number: 15v421000 (visibility) and stated that the parts needed for the repair were not available. The contact stated that the manufacturer exceeded a reasonable amount of time to the recall repair. The manufacturer was made aware of the failure. The failure mileage was 140.000.

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 Apr 20, 2014 · Engine, Transmission · 44,000 miles · TX

44,000 miles check engine light came on . Took to dealer I had a cylinder 5 misfire code p300 couple thousand miles later my truck was still showing multiple misfires. I had to replace the radiator because it was leaking and thermostat at 46,000, april 2011 at 65,000miles my transmission went out completely and had to be replaced july 2012 air stop working took to dealer they said I had to replace the fan blower motor resistor. Researched and founded this was a known problem for hummers the motor gets to hot and melt causing the fan blower to go out . Several months later check engine light came on several more times took to the dealer said they couldn't find problem and cleared code my check engine light came on again so I took to auto zone diagnostic showed cylinder 5 coil multiple misfire so I had spark plugs changed alone with all five ignition coils. Couple months later check engine light came on again took it to dealer diagnostic test reveal code po 300 again and couple other codes dealer said my truck had an emission leak. Multiple misfire ,cylinder 5 and a small crack in the head. I didn't understand how that magically happen. I paid the dealer to fix this on march 2014. A week later check engine light came on again . Took to dealer diagnostic showed emission leak apparently they didn't fix it the first time. Week later check engine light came on again took to dealer and diagnostic test reveal torque converter clutch solenoid .dealer said I need transmission replaced. I'm confused at this point the dealer put a newtransmission 3 years prior .my truck has never been over the road. I only drive locally. Now at 103,000 miles the dealer is saying I need another transmission . Something is not right here. After researching I've found thousand of hummer owners experiencing the same problems I've experienced. Something needs to be done to protect consumers.

Filed Apr 8, 2014 · Acceleration, Engine · 66,000 miles · WI

I own a 2007 hummer h3 with 66000 miles on it. It has been diagnosed as having a bad head due to the use of soft metals for the cylinder sleeve. Due to this, there is sudden reduced power. The cost of this fix is about $4500.00. My truck began with a check engine light on (autozone) said it was a misfire on cylinder #5. I went to the local dealer and asked them to look at the truck. They diagnosed it as a #5 cylinder having the compression leak of 90%. In looking on the internet (at hummer forums), I observed that quite a few hummer h3 owners were writing in about their experience with misfires and bad heads, at about the same mileage. I think this needs to be looked into and that gm should be ordered to do a recall. This is the same problem they had with the 3.5l engines they used in their pre-2007 hummer h3 and colorado. I am going to write my congress rep and ask that with the problems that gm is having right now, that this also be moved forward and that they order an investigation. Any other hummer h3 owners with the same problems should do the same thing.