2010 GMC Terrain acceleration problems

Filed May 15, 2022 · Acceleration, Engine · MA

My 2010 Terrain had been been intermittent dash warnings for “Service StabiliTrac” and “Engine Power Reduced” which would force the engine to reduce the speed itself down to about 30 MPH. After turning off car and restarting, warnings would go away. Yesterday, while driving on a secondary road, with no check engine light on, the engine stalled while traveling at approx 35 MPH. I was able to drop the vehicle into neutral and coast onto a side street, while also attempting to restart the engine. I was able to pull over without causing an accident. After letting the car sit for a few minutes I attempted to restart the engine, but only got a strange noise from the area of the upper cylinders. At his point the check engine light was now on. While waiting for a tow truck, and independent mechanic pulled up to ask if I needed help. After listening to the noice from the upper engine he asked if he could get tools and look in the engine. I said yes. He quickly pulled parts off the upper engine and opened and removed the upper cylinder cover. This revealed that the timing chain had no tension, as well as shards of shattered plastic all over the place, in and around the upper cylinders. After pointing this out he put everything back together and suggested I contact the dealership I got the vehicle from, which I have done already. He then stated that it appears that the engine would need to be replaced or rebuilt, due to catastrophic engine failure. He said my quick thinking of putting the vehicle into neutral probably avoided causing an accident and allowed me to get myself to a safe spot before stopping the vehicle. He also stated that this particular GM motor is known for catastrophic failure, which GM has failed or refused to acknowledge

Filed Feb 15, 2021 · Acceleration, Electrical · 59,000 miles · NY

Driving 50 MPH on the highway, my car decided to 'reduce engine power' and 'service stabilitrak' came on, immediately making the car slow dance forcibly to 25 MPH. The car was shaking and stepping on the gas did nothing. That's dangerous, because the person behind me has to swerve or hit into the back of me for sudden drop in speed. You guys should know better! Happened twice in one day. I had to restart the car, and it happened going onto the bridge. Someone could be seriously hurt, or killed. Do better!

Filed Dec 20, 2019 · Acceleration, Engine · 80,000 miles · IN

2010 gmc terrain with v6 loss of power, engine codes timing issue, camshaft sensor fault, crankshaft sensor fault. Stabil-track fault. Rough idle, oil consumption. The list goes on. This is a common thing with these engines and gm has done nothing. This has been going on with this vehicle for awhile. Stay away from gm vehicles they do not stand behind there products, I will be buying a ford and I will tell everyone I know!

Filed Jul 8, 2019 · Acceleration, Electrical · FL

Tl* the contact owns a 2010 gmc terrain. The contact stated that various warning indicators and gauges flashed. Cadillac vera pembrooke pines (954‑517‑7827, 300 south university drive, pembroke pines, fl 33025) was notified of the failure, but was not authorized to schedule an appointment. In addition, while attempting to accelerate from a stop sign, the vehicle failed to gain speed when the accelerator pedal was depressed. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failures. The failure mileage was not available.

Filed Oct 19, 2018 · Acceleration, Driver assistance · 98,000 miles · IL

While driving my car the stabili-track service light comes on. Then the check engine, brake, ABS, awd, as well as the power steering lights come on. Then I lose power steering and my speed is throttled down a lot. Its happened on the expressway and city streets. When on the expressway I have to immediately get to the shoulder without getting into an accident. I've had my car towed to the mechanics shop multiple times and they've told me that there are no codes when hooking up the computer. They kept it a few times in the last 3 years and have told me there were misfires after letting the car sit and testing it out (test driving) and work was needed (throttle body replacement, spark plug replacement, cam shaft swap out and a full tune-up). $1000 and less than a year later it happens again and then again. This is the 3rd year (2016, 2017, 2018) it has happened to me in a row and all the mechanic can say is that it may be something gm should investigate. I've called gm with no luck. This is extremely unsafe and I am thankful that my kids were not in the car when it happens. Trying to navigate traffic on the expressway when your car throttles down to 25-35 MPH is insane.

Filed Sep 25, 2017 · Acceleration, Brakes · 130,000 miles · MI

The drakes lock up and will not release until the car sits for sometime about 2-8 hours.the service stabilitrack light comes on and you lose engine power almost instantly. I have had four different shop fix what they suspected was the problem and the last shop was a dealership and it happened to me a week later while out of town for a wedding.

Filed Feb 25, 2017 · Acceleration · 83,137 miles · CA

While driving on freeway in san diego, ca during morning rush hour, car suddenly lost power. Dashboard message was "reduced power to engine." car would suddenly only go 30 MPH. Very dangerous. I was in the middle lane of freeway and luckily avoided collisions, as traffic flow was 70 MPH. Took car to gmc dealer and throttle body had to be replaced. Total cost was $458. I could have easily created a major traffic accident causing injury to myself and many others because I suddenly could only drive 30 MPH.

Filed May 5, 2016 · Acceleration · 48,000 miles · IL

Tl* the contact owns a 2010 gmc terrain. The contact stated that while driving at 30 MPH, the accelerator pedal was depressed but the vehicle failed to accelerate. In addition, the contact stated that the vehicle failed to reverse. The vehicle was towed to a dealer who diagnosed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 48,000.

Filed Jan 6, 2015 · Acceleration, Driver assistance · 60,000 miles · VA

Driving back from a two hour trip at aprox 55 MPH our 2010 gmc started flashing "reduced engine power" with the check engine light, and "service stabilitrak" with the stabilitrak light. Speed dropped down to about 30 MPH without control. The car was idling heaving with rmps jumping. We pulled over to the side of the road and restarted the car, the only light that remained on was the check engine light. Speed control was restored. By the time we made it home, aprox 20 miles, the check engine light turned off. Then a couple weeks later again, twice in one night, back to back. I called the dealer for an appointment because I assumed it would be covered by a gmc warranty, they did not have availability for 7+ days. The night before my appointment it happened again but did not correct itself and we had to drive it to the dealership at 30 MPH. I just received the news, $800 later, it needs a new throttle body, exhaust cam solenoid and another repair to the camshaft. I do not have the paperwork back from the dealer yet for additional details, but am disappointed that this is a common problem with the 2010 gmc terrains and they take no responsibility for the repairs. This should be a recall. There is a lot of potential danger to having your speed drop with no warning or control.

Filed Aug 13, 2014 · Acceleration, Steering · 41,000 miles · AZ

Vehicle quickly decelerated from about 46 MPH to 5 MPH. It would not accelerate above 5 MPH. No warning signs before hand, happened out of nowhere. Then an error light came on the dashboard. Gmc mechanic stated the throttle body was bad and replaced it, it was not covered under warranty (cost $540.00). This could have caused a major accident on a freeway or busy street, or could leave someone stranded on the side of the road with no warning.