2007 Hummer H3: sudden loss of power

Filed Jun 20, 2018 · Acceleration, Driver assistance · 180,000 miles · FL

Vehicle instrument panel warning shows: service traction control reduced power stability system failed vehicle misfires when this happens sometimes vehicle shuts off in the middle of the road when trying to restart it does not restart sometimes after this

Filed Jun 20, 2017 · Electrical · 112,171 miles · OH

Tl* the contact owns a 2007 hummer h3. The contact stated that various warning indicators illuminated and various electrical functions activated independently. The contact also indicated that the vehicle experienced a loss of power. The vehicle was towed to ferris chevrolet where it was diagnosed that the body control module was defective and needed to be replaced. The manufacturer was notified of the failure and referred the contact to the federal safety agency. The failure mileage was approximately 112,171.

Filed May 4, 2016 · Engine, Transmission · 103,306 miles · MI

The vehicle just lost power and almost lost ignition while driving 50 miles an hour. Diagnostic code state, misfire in cylinder one. Valve springs ( rocker arm) are breaking prematurely causing a leaking valve problem. Mechanic also noticed other springs were fatiqued causing a looser than normal seating. Gm service manager mention a spring problem on 2006 2007 rendevous. One of the largest complaints with the hummer 3 is this leaky valve syndrom which the dealers know about. Some occuring with the vehicle having only 30,000 plus miles.

Filed Apr 27, 2015 · Brakes, Engine · 100,000 miles · KY

While driving at 65 miles per hour the vehicle dash lit up all service lights the vehicle went into reduced power mode not allowing the vehicle to exceed 40 MPH and ABS sensors came on staying traction fail, ABS fail, began to stutter and stall. Took to shop. Vehicle running codes for spark plugs, replaced spark plugs. Few weeks later did it again, this time saying throttle body. Replaced it, a month later did it again, each time in major traffic having to pull off roadway to avoid an accident. This time says misfiring, throttle body, ABS,TPMS, thermostat, etc. Take it to have compression test run and system says cylinder failure. Do research on issue and find that there are hundreds of complaints about this online having caused accidents and thousand of dollars spent by consumers after having accidents but no known fatality so gm will no recall or honor the issue repairs. Almost all of them happening at 100k miles.

Filed Oct 1, 2014 · Engine · 120,000 miles · FL

The car shut off as I was making a left hand turn with no warning or indication. Complete loss of power.

Filed Aug 19, 2014 · Electrical · 119,400 miles · SC

Was driving in a small town and the vehicle just lost all power with no warning. It cost me over 600.00 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.

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.

Filed Feb 19, 2012 · Acceleration, Electrical · 35,000 miles · NM

Ever since I purchased this vehicle, the vehicle has stalled at between 25mph and 0. I work for the us census bureau, permanent worker and I travel through all types of weather conditions in a day, from 9,000 ft mountains covered in snow to desert gravel roads, mesas, cliffs. Over the past two years the vehicle has shut off while traversing mountain roads covered in snow with no guard rails, and three times, when the engine shut off, I lost steering and came within inches of going off the side (cliffs) of these roads, not to mention in town, when my engine shuts off as I drive, I have come close to hitting other vehicles or poles as I lose power steering on a turn.. I have to drive about 90 miles one way to get it serviced, while under warranty, I had it "repaired" about five times, no success, once warranty expired, gm dealers 90 miles away were still willing to inspect vehicle since problems started while under full gm warranty, but now, they refuse to give me a rental and tell me they do not know what the problem is. My local gm dealer (alamogordo) refuses to inspect vehicle and thus I am required to make a 180 mile round trip, but now, even dealer tells me they do not know what the issue is and they cannot reproduce the problem in the shop. I took about 6 videos with my droid after the problem happens, because the problem lingers for about 15 minutes, then it stops and the vehicle works fine. The videos how the RPM's going up and down, up and down, until the car shuts off, I restart it, then it shuts off again, over and over again. Problems usually appear in the am, as I drive off for the first time, before it is driven a good distance, but can and has happened at any moment. Very dangerous and I do not feel safe each morning as I leave my mountain home, especially in cold snow weather.

Filed Jul 9, 2009 · Driver assistance · 62,000 miles · KY

"stab track system failure" comes on when driving, which makes the car lose power and speed in the middle of traffic. This has happened 3times in about 6 weeks. Dealer claims they have fixed it 3 times, now they admit they don't know what is wrong with the vehicle and unable to fix. Service dept says they cannot narrow down the problem but the computer does recognize that it is a stability control issue. I am afraid it will do this on the interstate and I will be run over or killed by traffic.

Filed Oct 15, 2008 · Driver assistance · 26,500 miles · ME

"stab track system failure" comes on when driving, which makes the car lose power and speed in the middle of traffic. This has happened 4 times in about 6 weeks. Dealer claims they have fixed it 4 times, now they admit they don't know what is wrong with the vehicle and unable to fix.