I bought this vehicle June 2012. I started having transmission problems last week. The transmission would stick when stepping on the gas or when going in reverse into my garage. I found over 200 complaints about the transmission. This should be a recall item. I was driving on the highway trying to get up a hill when the car started to do this. I luckily was not far from my exit and made it to a gas station when the car just stopped.

- Lansdowne, VA, USA

The vehicle would not shift out of 2nd gear going down the highway. The check engine light came on, and there are now four codes all for internal transmission issues. The car is 4 months past the 5 year warranty, but only 64000 miles. This is a huge safety issue. If this transmission fails while on an interstate highway, and it will not go over 20 mph, the results could be deadly. By researching this issue I have found a considerable amount of complaints about 2007 GMC Acadias between 50000 and 80000 miles having transmission failures, but yet no recalls. This is an issue that GMC is well aware of, through their own admissions. Why is there such a delay waiting for a recall" are all of the complaints going to have to wait for a fatality before GMC admits there needs to be corrective actions"

- Wheatfield, IN, USA

The car has had electrical and engine problems since we purchased it due to water leaks from a flawed sunroof design. Even after a recall to fix the sunroof to prevent water leaks; it continues to leak and damage electrical and engine systems. This is an ongoing problem and is a widespread concern for the 2007-2008 GMC Acadias. I would like someone to investigate this problem. I believe it is a safety concern because the leaks occur in the area where there are airbags. I think there is a structural defect that may not be able to be repaired and it presents a safety hazard for all who drive these vehicles. Please investigate this problem. Do not let GMC sweep this under the rug!

- Gustine, CA, USA

While traveling at 45 mph, and with no warning (weird shifting, etc) the transmission completely failed. After being lied to by the dealership and GM, I did my own research and found that this is a common problem with this model year, so much so that GM has created a special program to fund part of the repair if the vehicle is out of warranty. (wave plate failure in the transmission). This vehicle should be recalled with a mandatory replacement of the wave plate.

- Matthews , NC, USA

My 2007 GMC Acadia's first started having transmission problems in December of 2012. The vehicle started having issues while trying to merge onto the highway or depressing the gas pedal for a passing and/or merging purposes, this would somehow revert into a neutral position, having the rpms rev up and no forward motion, until it's sort of caught up itself by backing off on the accelerator. The other issue involved putting the automobile into reverse, not only at times it wouldn't go into reverse but instead would revert to a neutral position, until you started all over again with the process of putting it back into park and then back into reverse. Never was there a light nor a warning by the cars sensors or any other symptoms that would give an owner a warning that there would be a problem coming soon. In any event, after having the symptoms described above the car somehow dropped into first gear and cannot shift from that position and finally, the transmission light came on. At the moment, I am in the process of filing a complaint with GM and at the advice of the GM representative, they advise me to have the dealership look into the situation. In my opinion, this is a very dangerous situation. Seeing all the same complaints on the internet leads me to believe that there should be a further discussion on the transmission of the 2007 GMC Acadia. Thank you

- Boynton Beach, FL, USA

The contact owns a 2007 GMC Acadia. The contact stated that while driving 40 mph, the transmission failed and the vehicle would not accelerate any further. The vehicle was towed to the dealer for inspection where they stated that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified but provided no assistance.the failure mileage was 73,000.

- Trafalgar, IN, USA

I have a 2007 GMC Acadia the transmission is slipping. The dealer told me is a valve body inside transmission, need to replaced whole transmission don't have warranty so the amount is $2600 just the transmission no labor. Now I was reading and there's many cases like this they are saying the parts they used to build trans are made in china that's why there slipping and having trouble with it. Need U guys to check on this power train problem before some one gets hurt while driving it is dangerous. My wife was driving with my boys inside every single one of them got scared and say that they don't like this truck no more thank you.

- Los Angeles, CA, USA

We were leaving my sons basketball game tonight and when we went to enter the interstate the tachometer went to 5000 RPM's and the vehicle was not moving. As I am setting along the interstate with vehicles hammering by me at 75mps I tried to go again. To no aval the vehcle would not move. I called a tow truck, moved my wife, 11 year old son and 16 year old son over the guard rail to safety. The transmission is bad, along with all the others posted on the internet. What gives" this vehicle has 88,000 miles on it and im told GM wont fix it because th 5 years is up on the warranty. What does 5 years have to do with anything when this is happening everywhere to this particular vehicle?"

- Corning, NY, USA

Manufacturer defect to transmission.

- Lutz, FL, USA

Transmission dead-racing RPM without gear shifting, broken wave plate inside transmission is the cause. Water leaking from sunroof when raining, constant whinning in steering column. All these major problems under 75K miles.

- Kansas City, MO, USA

My wife and my son was driving to work on the expressway 826;at the exit ;making a turn; the car pull hard the wheel and it keep the defect. I had to pay the mechanic for change the pump but car has a noise and the wheel hard in interval.

- Hialeah, FL, USA

Transmission went completely out while driving on I-79 4 hours from home, while driving the speed limit of 60-65mph, had to push car out of road, towed car to a dealership that we did not know, was told the transmission was completely gone and had to be replaced at a replacement cost of $3600. Had to rent a car to get back home in which cost $275, went looking into this matter found over 90 pages of complaints on edmunds.com.

- Forest, VA, USA

While accelerating vehicle started to shake between 30-40 mph. Shaking subsides at around 45 mph. This started around May 2012 with 99,000 miles on the car. Took the car to the dealer to have it checked out because I though it was the transmission. They thought the tires needed to be rotated and balanced, which did not fix the problem. By 106,000 miles it was so bad that the vehicle could not be driven safely. This time the dealership said it was the motor mounts, which did not fix the problem. I had them keep the car until they found the problem. After 2 weeks they determined that it was the transmission! after the transmission was replaced the vehicle drives great. I have read hundreds of complaints on the Acadia transmission and there are likely tens of thousands of cases just like mine. There should be a recall for the transmission on this vehicle.

- Jacksons Gap, AL, USA

The contact owns a 2007 GMC Acadia. The contact stated that while driving approximately 60 mph the vehicle started to slow down without any warning and after a few minutes it started to speed back up. The vehicle was later towed to a dealer for diagnosis. After diagnosis they advised her that the transmission has failed and needed to be replaced. The vehicle has not been repaired. The manufacturer was contacted and they offered no assistance. The failure and current mileage was approximately 86,000. The VIN was unavailable.

- Upper Sandusky, OH, USA

Transmission failure causing car to go to 1st gear and dramatically reduce speed in traffic. Seems to be transmission wave plate.

- Maryville, IL, USA

9/27 as I was driving in a residential neighborhood to take my daughter to school I was approaching a green light at a four way and started to accelerate to 35 mph from a complete stop to cross four lanes of traffic. The vehicle reached 35 mph and although the speedometer stated 35mph the vehicle stopped moving and stalled and started making a churning noise coming from the engine. At this point my front end was in traffic under the light that was now turning red so I had to think quick and put on my flashers to alert the other drivers that I was having difficulties as I couldn't get the truck to move. When I pressed the gas pedal the engine just roared but no movement. Once other drivers were alerted I had to coast backwards from the incline at the light and maneuver onto the side of the road. I turned the truck back on and it came on and miraculously I was able to drive it 5ft off the road before it stalled again. I had to be towed to a dealer as of today I was told it was the transmission but the dealer had to contact GMC to report all major engine failure before proceeding with any work. Last year in Dec. My truck started making whining noise and I immediately took it to the dealer to find out that the camshaft had went bad and spit metal in my motor causing me to have the engine replaced. Because I was the second owner of the vehicle GM didn't want to pay for the total bill under the powertrain warranty and the fact that I was 3000 miles over the powertrain warranty itself. They did pay a third of a $5000 bill and I had to pay the rest only to have them place a recall on the camshaft and to reimburse me half of what I paid. This situation with the transmission reminds me of the rollover with the Firestone tire Ford had years back but the difference is that Ford and Firestone took responsibility. Please make GM responsible before someone is killed.

- Elizabeth City, NC, USA

Transmission went on vehicle with daughter behind the wheel.

- North Tonawanda, NY, USA

My transmission went out after 58,000 miles and 5 years and 5 months. So I am over my warranty by 5 months and am out $3300. In doing some research, there seems be an abnormally high incident of transmission failures on the 2007 GMC Acadia. Some bloggers indicate that the Acadia models have big issues before the 2010 model. Is there a systematic issue that GMC needs to address or am I just unlucky?

- Plano, TX, USA

The contact owns a 2007 GMC Acadia. The contact stated that while driving 70 mph, the transmission failed and the check engine light illuminated on the instrument panel. The contact stated that the vehicle stalled. Also, the contact mentioned that he had to disconnect the battery and reconnected it in order to reset the system. The vehicle was taken to the dealer who diagnosed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 71,000.

- Port Saint Lucie, FL, USA

The transmission wave plate fails causing highly erratic shifting and abrupt vehicle speed control. Rapid deceleration while underway in traffic. Very dangerous.

- Lakeland, FL, USA