I purchased this vehicle at a somewhat reliable local dealership only to have the vehicle in and out of the shop a total of 6 months for the first year and a half of my ownership. The problem with the vehicle has been, and still is, the transmission and it's ability to slip in and out of gear at random. At intersections, stops and starts, as well as in movement the transmission will disengage and slam into gear with a loud clunking noise and jerking action. On an incline, it will actually roll backwards thus forcing the need to constantly cover the brake for this concern. The service manager at the dealership says he has done all he can do and GM insist that this is normal for the transmission to work this way. They even issued a copy of a memo to the dealership about this. They have assured me that if anything were to happen with the transmission it would be covered. Forget about creating an accident, or my wife or myself getting killed! I figure this a very unsafe vehicle and will probably have to get rid of it before it gets rid of me or somebody else unless GM fixes it and makes it right. Economically I'm not in a good position to just get rid of it because I owe so much on it but even if I did an unsafe vehicle is put back into circulation for somebody else to deal with. On another note, the service manager's shared with that his father bought a 2013 Chevrolet truck with the same problem and had the transmission slam into gear the same way mine did while he was pulling away from a toll booth while towing a boat back from Connecticut. Consequently, this appears to be a problem spanning additional years as well. Clearly a defective design in drive train. Please consider investigating this issue and make GM responsible for addressing this issue other than issuing a memo and turning their heads the other way. There might be many lives save by taking action now.

- Hudson Falls, NY, USA

This has happened twice in the last week. Today I was sitting at a stoplight with my foot on the brake and suddenly without warning my 2010 Silverado accelerated and lunged forward about 3 feet. Fortunately there was not a car or person in front of me or I surely would have had an accident then the engine started missing. At the same time my check engine light came on. Service traction control, service stabiltrak, engine power reduced flashed on my dash. I limped home at 10-15 mph max! after about an hour I started it and it ran just fine "both times". the first time this happened I was in a parking lot with the transmission in park. It is now at my local Chevrolet dealer for repair.

- Omaha, NE, USA

Truck was shifting up and down at low speeds noticed that the transmission cooler lines where leaking. Towed truck to dealer when I noticed that transmission oil was leaking onto exhaust pipe. This was a very dangerous situation where the truck could go on fire. Transmission had seal failure in which it was rebuilt at dealer. Transmission rebuilt was covered under warranty but cooler lines where not.

- Woburn, MA, USA

The vehicle accelerates on its own, sometimes from a dead stop, sometimes while going at a set speed it will accelerate without pressing the accelerator. You have to forcefully put pressure on the brake to slow down. This happens at various times and at various speeds.we have written it down on every occasion and there are 16 so far. This vehicle has been to the dealer several times and they have yet to repair any of the problems. The manufacturer has never contacted us despite the problems and complaints.

- Ortonville, MI, USA

Entire vehicle shut off as if the key were turned off, this has happened 14 times in thirty months all at various speeds on various highways and at various times of day. You thus loose engine, power steering and power brakes.

- Ortonville, MI, USA

Gauges stick 4 wheel drive will not engage intermittently and then will not shut off when engaged intermittently.

- Ortonville, MI, USA

Transmission cooling lines are leaking where rubber hose is crimped onto metal hose, GM part #25999419. Dealer is aware of issue, and states it is very common, but would not replace under warranty. Vehicle is less than 3 years old but has 47, xxx miles on it and the warranty is only 3 years / 36,000 miles. If the line busts, it could cause the transmission to stop shifting and would be unsafe as automatic transmission fluid would leak everywhere.

- Huntington Beach, CA, USA

Engine, powertrain and electrical shut down, fuel shows empty when full, has happened nine times while at speed. Have to coast to stop where ever room can be found, turn key to off and wait then restart.

- Ortonville, MI, USA