While in drive, going uphill, for example an up ramp in a parking garage, the car rolls backwards if I take my foot off the brake. It has always rolled a bit before catching in the past, but now it will roll back without stopping if I release the brake.

- Tinley Park, IL, USA

Engine light prompted a trip to the GMC dealer to have the vehicle checked out. We were told it was the timing chain and it was a know problem, however GMC is not covering it. What" really" so, we have to pay 3000 bucks for GMC known problem. Never buying another GMC.

- Maple Valley, WA, USA

GMC knew of timing chain issues for 2007-2009 and extended the warranty for 10 year 120,000 miles. They continue to have the same timing chain issues through 2010 models and will not replace them under this warranty. My Acadia is 2010 model, but manufactured in 2009 and GMC will not assist with the replacement of the stetched timing chain. They pride themselves for "consumer satisfaction protection" but will not stand up to their product under for issues they are fully aware of.

- Brighton, CO, USA

The cam shaft engine correlation code indicated stretched timing and chain guides. Extended warrantees up to 10 years and 120,000 miles have been offered for 2007 and 2009 GMC Acadias with the same problem. To date they have not been offered for the 2010 model even though it's the same issue. Mine failed at 51,000 miles. Had to have the timing chains replaced. Dealership repaired with GM paying half. This should be a recall due to the fact my car was manufactured in 2009 and should fall under the above mentioned recall as the failure is for the same reason. I am concerned why special coverage #11340 does not apply to 2010 vehicles of this nature as there are many issues with this that have not been resolved in the 2010 vehicle.

- Maple, GA, USA

The contact owns a 2010 GMC Acadia. The contact stated that the transmission failed. The vehicle lost acceleration and emitted a whining noise. The failure was experienced numerous times. The dealer diagnosed that there was a failure code related to the transmission. The vehicle was not repaired. The manufacturer was notified. The VIN was not available. The approximate failure mileage was 80,000.

- Capitol Heights, MD, USA

Timing belt issues!

- Waterford, MI, USA

Transmision slips in drive on hills. It actually rolls backwards when you take your foot of the brake. Even when the transmision is in gear

- Warren, MI, USA

I have a 2010 GMC Acadia. Several months ago I received the GM special coverage extended warrant letter # 14329. At that time, I had already noticed extreme difficulty in turning the wheel at low rates of speed and brushed it off as probably needing power steering fluid I also noticed a "whining" noise along with this action. I began to worry as the matter kept worsening and already still had trauma from a prior accident in 2010 which left me to purchase this vehicle in 2011 which I thought would be a more safe stable vehicle for me. Upon a few weeks later, while trying to make a left hand turn maneuver, the steering wheel completely "locked" up! luckily, no oncoming traffic was in sight, otherwise, I would have been unable to get out of the way as I was in the middle of the highway! I immediately contacted the dealer and explained my issue and named the letter I had received a few months prior. Thus, an appointment was scheduled. I took my vehicle in on that specific day. The dealer contacts me to inform me that the pump was covered in the warrant but not the rack which they said was leaking on both sides (which is the most expensive part). My out of pocket expense of $1200 after labor and the alignment!! all the parts of the power steering system should be paid for all expense by GM!! this is a tremendous safety issue and peoples lives are at danger! no one has $1200 to just drop on auto repair and I had to take out a loan!! what is GM waiting for hundreds of deaths?!! there's already a class action lawsuit filed GM 4-1-13. GM needs to reimburse me and all others!! GM's CEO's need to do a major recall and take care of their customers. This is no joke and an extreme hazard! I'm also filing a complaint with GM as well.

- Printer, KY, USA

We bought our 2010 Acadia certified used with 60,000. Water pump went out, navigational system stop working and I noticed a hesitation in shifting from time to time but not consistent. This all right after purchasing. The dealership fixed water pump as it was still under warranty. I took the vehicle in for a recall notice and asked if they could find what was wrong with the dvd/cd player, was told I needed a new radio. I also told the mechanic I thought something was wrong with the transmission, that issue was not addressed as though I hadn't mentioned it. So I went online to see if I could find a way to fix the dvd/cd player myself and that's when I found all these other Acadia owners with the same issues...so I thought it best to get rid of this time bomb before its too late. Went to trade it in on a used vehicle, salesmen drove it, brought it back and told us they would have to take 3000. Off for bad transmission. I contacted GMC all they would do was give us 2000. Toward a new or lease vehicle. This is a defect in manufacturing, its not a quality product as we thought we had purchased. This is the way of the world today, no accountability, no ethical responsibility. Its your problem GMC, fix it!!! I am looking to get a class action lawsuit started.

- Memphis, MO, USA

I have to keep adding power steering fluid to my car. I have been told that my power train will need to be replaced and that GMC is aware of this problem with the Acadia's and refuses to fix the problem.

- Dorchester, MA, USA

The contact owns a 2010 GMC Acadia. While making a left turn at an unknown speed, the vehicle jerked violently and the steering wheel seized. The contact had to forcefully turn the steering wheel. The dealer was unable to diagnose the cause of the failure. The vehicle was not repaired and the manufacturer was notified. The approximate failure mileage was 51,000.

- Ocean City, NJ, USA

After my 2010 Acadia sat in a hotel parking lot for 19 hours after a drive from san diego to Kansas City, it overheated the minute I started it. The air started blowing warm air, it stated "powering down engine", & the temp gage maxed out. I immediately turned off the car. At less than 36K on a car that has been driven minimally, this should never happen. And now.... since it is "over 3 years old", it's probably not covered. $40K vehicle with 30K miles on it and already overheating? we had our vehicle for the last 2.5 years in Hawaii, so it's not a climate problem. :-/

- Fort Riley, KS, USA

The contact owns a 2010 GMC arcadia. The contact stated that while traveling 20 mph, the power steering failed and there was an abnormal noise coming from the vehicle. The vehicle was taken to a private mechanic where it was diagnosed that the transmission and system fluid needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure and current mileage was 54,000.

- Somers, CT, USA

This has happened several times since I've bought this truck last year. Right after I bought it, I had to pay out of pocket to have the power steering box replaced ($1200) since then, while driving my steering gets hard to turn either way and the engine even stopped running a few weeks ago while on the interstate, I had to pull off the road. The truck also makes a popping sound while turning too. Since I have bought the truck, I have had nothing but problems, within 2 weeks of buying it, I had transmission leak and oil leak that had to be fixed. I want so bad to get out of this truck. I am the sole provider in my home, single mother of 3 kids and this vehicle is used for our daily commutes and my job. When slowing down to come to a stop the truck also lunges forward a few times before stopping completely. Also when going down the road the RPM will lunge up for no reason and you can hear it like it is trying to shift to a higher gear or like I have pressed the gas, which I had not.

- Pembroke, GA, USA

Car rolls back when on a hill while in drive at traffic light or stop sign.

- Orangeburg, SC, USA

While accelerating on the entrance ramp for central expressway, hwy 75, it became very sluggish, and all of a sudden had no pick up. I nearly got rear ended by a fast truck! since April of 2011 I noticed that it had no pick up. The problem seemed to go away, when I learned to not accelerate too much to enter the highway, just gradually vs in a hurry. Then today, Sept 2011, while driving at apprx 45 mph on a busy road, the car seemed to pull back, and the traction light comes on, and beeps at me. It was a sunny, dry day. I pull over in a parking lot, turn off the engine, to get something out of my trunk, and it would not open - and, no, the override button was not on. Weird. I start the car, and the problem goes away, and I drive safely back to my destination. Why does the problem always exist when I am by myself, and watch, when I take the time off to bring it to the dealership, everything will be just fine. I pray that I make it to the dealership and they diagnose some sort of defect and fix it because it still is under warranty. I cannot bear the worse case scenario of anything happen to my family.

- Allen, TX, USA

My 2010 GMC Acadia slt rolls backward on inclines even though the transmission is in drive. I have driven automatic transmission vehicles for years and in my experience they are not supposed to roll backward in drive. If anyone is behind the vehicle when this occurs they could very well be crushed. The dealership stated this is normal behavior, but this is not and they should be required to fix the problem.

- Washington, DC, USA