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Automatic Transmission Problems of GMC Acadia



GMC Acadia owners have reported 19 problems related to automatic transmission (under the power train category).

car image   Automatic Transmission problem of the 2010 GMC Acadia 1
Failure Date: 08/01/2011

2010 Acadia transmission and traction control safety problems. While driving 70mph on the highway, the traction control system alarm came on in addition to a flashing stability control and abs warning lights. The rear passenger wheel locked up, the transmission downshifted into 3rd gear causing the vehicle to veer into the right lane. Additionally, we have been having power steering pum problems with the vehicle which made the vehicle difficult to control in this circumstance. Fortunately, there was no other vehicle in the right lane and maanged to pul the vehile off the road. I had my family in the vehile at the time which made everyone very scared for their safety. The vehicle was turned off and restarted which erased the abs and traction control warnings, but the engine check light remained on and was unable to keep the transmission in drive. The dealer replaced some ecms, but could not fix the power steering issue. Three weeks later, the transimission started shifting hard and after 2 visits to the dealer is not being ivestigated for another ecm failure. The electric systems and power steering issues make this is a very unsafe vehicle.

See all problems of the 2010 GMC Acadia.

car image   Automatic Transmission problem of the 2008 GMC Acadia 2
Failure Date: 11/15/2010

Recently, when loading the cargo area of my 08 GMC Acadia, the vehicle started rolling forward (the ignition was off, and in "park"). It rolled approximately 2 ft. Before "park" engaged. (my 2 grandsons were playing in my driveway a short distance away). After having the vehicle checked out at the GMC dealership where it was purchased the service mgr told me that this is a "normal" condition, acceptable by gm, that the parking gear "pawl" can actually roll up to 2 ft. Before engaging. It doesn't seem probable, or even possible this can be considered to be a "safe" condition. When I asked who would be responsible for injuries resulting from this situation his response was, "gm".

See all problems of the 2008 GMC Acadia.

car image   Automatic Transmission problem of the 2010 GMC Acadia 3
Failure Date: 11/14/2010

My 2010 GMC Acadia rolls backwards 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 backwards in drive. If anyone is behind the vehicle when this occurs they could very easily be crushed. The dealership acts as if this is normal behavior but it is not and they should be required to fix the problem.

car image   Automatic Transmission problem of the 2011 GMC Acadia 4
Failure Date: 10/18/2010

The contact leased a 2011 GMC Acadia. While the contact was driving between approximately 10-15 mph on the entrance ramp, the accelerator pedal was engaged, followed by a delayed response of several seconds. The failure was a continuous occurrence. The vehicle was taken to the dealer for diagnosis where they informed that the transmission delayed response was a manufacturer design. The failure mileage was 30.

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car image   Automatic Transmission problem of the 2008 GMC Acadia 5
Failure Date: 09/11/2010

2008 Acadia 50,000 miles. A whinning noise from the time I start the car until the car is cut off. Repairman stated that they were aware of the problem and they had no fix for it now. He told me it would be okay to drive. . . . . . . . . . Not very happy!!!!.

car image   Automatic Transmission problem of the 2007 GMC Acadia 6
Failure Date: 09/03/2010

Driving my 2007 GMC Acadia. Went to pass a slower vehicle, pressed on the accelerator to pass and the transmission went haywire and the accelerator stuck. I had to put the car in neutral to get it stopped. The rpms were in the 4000s. Then the acceleration would stop and start again over to 4000. Luckily when I passed the vehicle there were no cars in front of me or I would have had a major accident with the acceleration out of control. I took it to the dealer and they told me that two of the timing chains were very worn and there was an issue with the clutch pressure control with harsh shifts in drive range 3rd and/or 5th gear. This is the second time I have had problems with this issue. The first time the GMC dealer 'flashed' (reprogrammed) the transmission, even though it was not acting up when the car was taken into the shop. If this issue is not addressed "properly", I believe someone somewhere will be injured or killed. The condition my vehicle exhibited leaves me with a very uneasy feeling.

See all problems of the 2007 GMC Acadia.


car image   Automatic Transmission problem of the 2009 GMC Acadia 7
Failure Date: 08/05/2010

The contact owns a 2009 GMC Acadia. The contact was reversing from a residential driveway on a steep incline with the accelerator pedal lightly depressed when the vehicle abnormally began to roll backward. The vehicle independently rolled approximately ten feet. The dealer was unable to duplicate the failure. The failure recurred. The dealer was able to duplicate the failure but was unable to provide a remedy. The dealer advised the contact that the vehicle was safe to drive back to his residence which was 1,000 miles away. The vehicle was taken to a second dealer closer to his residence but they were unable to duplicate the failure. The dealer advised that the vehicle was operating as normal. The vehicle was not repaired. The failure mileage was 25,144 and the current mileage was 26,244.

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car image   Automatic Transmission problem of the 2010 GMC Acadia 8
Failure Date: 07/10/2010

The contact owns a 2010 GMC Acadia. The contact stated that when in parked or idling, the vehicle would roll backward without any warning. The vehicle was inspected by a dealer and they advised him that they altered the transmission so it was performing according to its design. The failure occurred on an intermittent basis for since 2010. The vehicle was not repaired. The failure mileage was approximately 10,000. Updated evoq 03/01/11. Updated 4/01/bf updated 05/06/11.

car image   Automatic Transmission problem of the 2008 GMC Acadia 9
Failure Date: 07/10/2010

My 2008 GMC Acadia has trouble accelerating/merging into traffic. The transmission, at least according to a GMC service writer, is due to GMC's transmission design. It was intended to upshift and even skip gears, in order to conserve fuel. I understand that this was "corrected" in later years. The dealership says it is "not a problem, it is the way it was designed to operate". If that is the case, then why was it corrected in subsequent models? entering traffic is dangerous, the transmission "lags" at all the wrong times, and accelerating to pass, or while changing lanes, produces the same lagging effect, thereby causing my vehicle to become a road hazard! this is totally unacceptable to me, and after spending almost $30,000 on this vehicle in 2010, I do not feel I alone, or I while driving with my family, should be subjected to this dangerous and hazardous situation 90% of the time we are on the road.

car image   Automatic Transmission problem of the 2008 GMC Acadia 10
Failure Date: 06/01/2010

I noticed that when driving on an expressway and would attempt to pass a slower moving vehicle, as I would move into the passing lane and attempt to accelerate, the car would hesitate for a few seconds, lose speed, then suddenly downshift and accelerate at an unexpected rate. I also noticed that the car would unexpectedly accelerate or decelerate under normal driving conditions. I bought the vehicle to the dealer for repair, they responded that they could find nothing wrong, but the what I was experiencing was characteristic of the 6-speed transmission on the vehicle. The problem continued and I found it dangerous. I returned the vehicle and the dealer's remedy was to "reset the transmission computer. " during this time, I also noticed that the "service stabilitrac and traction control" warning would come on. Onstar recommended I shut off the engine to reset the system. I found this only happened when I first used the car in the mornings to go to work. Again, the dealer said there was nothing wrong and the computers were showing no codes -- they also stated that they could not duplicate the problem. I got the car back from the dealer and it happened again - at 7:00 am. I called onstar and they gave me two codes. I bought the car back to the dealer and gave him the codes. It now seems that there were two defective sensors controlling the stabilitrac / traction control system and how they communicate with the transmission. I was told that gm is changing manufacturers on the sensors. I have not had use of the car since the beginning of June and am still waiting for gm to produce these parts. In the meantime, unexpected acceleration, deceleration, and gear shifting was occurring under all driving situations causing -- in my mind -- a danger to myself, my passengers, and others. The dealer has had the car on five different occasions since June 8. This last service they have had the car since July 20.


 
car image   Automatic Transmission problem of the 2009 GMC Acadia 11
Failure Date: 12/13/2009

Our 2009 GMC Acadia, with front wheel drive, rolls backward when parked on a slight incline even when the transmission is in drive. This past weekend it rolled backward hitting my husband who was walking behind the vehicle. He wasn't injured but we believe this is a serious safety issue especially if children are involved. Also, the vehicle rolls backward, approximately one foot in distance, after the vehicle was placed in park and is parked on an incline. This also happened when the vehicle is stopped at an intersection, in drive, and when on an incline. This could cause an accident.

car image   Automatic Transmission problem of the 2008 GMC Acadia 12
Failure Date: 11/30/2009

I own 2008 GMC Acadia. On two occasions the weekend of Nov 28, 2009 once when I was driving, separately when wife driving, after the car was put in park and the ignition turned off, key removed, the car rolled backwards several feet until the brake was applied. Took the car to dealer service who could not replicate and expressed disbelief there was an issue. Surfed web and found NHTSA recall id# 09v073000 on 2009 Acadia. The recall is exactly what's happening with my 2008 Acadia. Just called gm 866# and they denied that the 2009 Acadia recall existed. Please help and get gm to recall the 2008 Acadia's with same issue as 2009.

car image   Automatic Transmission problem of the 2008 GMC Acadia 13
Failure Date: 11/15/2009

Power and power steering failure- when it rains or I drive through puddles of water the car looses power and slows. Also when I am driving the power steering stops working and there is a loud squealing noise. I had the dealer look at my Acadia and they said they could readjust the belt guard. This did not work and they said just be cautious while driving. Also the cruise control doesn't coast and the speed increases as you go down hill.

car image   Automatic Transmission problem of the 2010 GMC Acadia 14
Failure Date: 09/28/2009

2010 Acadia front wheel drive , when in drive or in park on incline the car will roll backward or forward depending on which way the incline is. It does not hold when you move your foot from the brake to the accelerator while sitting at a traffic light or when you are parking. I have had the car bump a passenger when they walked around the front of my car to get in and I had placed the car in park and took my foot off the brake. I have owned many cars and vans and have never experienced this type of problem and it occurs often and the dealership service department is ignoring the problem. If an elderly person or child should happen to be close to the car when this happens it could cause serious harm.

car image   Automatic Transmission problem of the 2007 GMC Acadia 15
Failure Date: 09/27/2008

Driving my 2007 GMC Acadia. Came upon a busy state highway. After coming to a stop, I saw an opening and pressed on the accelerator to cross the 4 lane road. When I pressed the accelerator, the car just started to creep out into traffic. The engine rpm's increased, but the car was moving at walking speed. It was obvious that the transmission had not shifted back into 1st gear. I tried to manually shift into low, but it did not respond. I finally was able to get it going fast enough to have it pick up some speed to get across the lanes of traffic. On the way home, every time I came to a stop, the car acted the same way upon acceleration. The only way I was able to get the car to go back into 1st gear was to shut the car off and restart it. Even doing that, it only lasted until the next time I stopped. After letting the car sit over night, it performed fine the next day. This is the second time I have had problems with this issue. The first time the GMC dealer 'flashed' (reprogrammed) the transmission, even though it was not acting up when the car was taken into the shop. I spoke with a car dealer at the shop, and he owned the same vehicle. His transmission has been 'reflashed' 6 or 7 times for the same issue. If this issue is not addressed "properly", I believe someone somewhere will be injured or killed. The condition my vehicle exhibited leaves me with a very uneasy feeling (I. E. When I press the accelerator, I expect the car to move). If reflashing the transmission (1, 2, 3, 4. . . 7 times) does not fix the problem, then maybe something different needs to be done.

car image   Automatic Transmission problem of the 2008 GMC Acadia 16
Failure Date: 06/18/2008

We purchased a new GMC Acadia on 6/16/08. Since our purchase, we have experienced a dangerous transmission issue. After coasting downhill, the vehicle fails to downshift which causes a rapid deceleration when traveling uphill. This rapid loss of speed puts the driver in the hazardous situation of a rear end/chain reaction collision on the road GMC claims to have a fix, but this fix causes the documented gas mileage to be reduced by at least 2-3 miles per gallon. They have attempted to fix this issue twice in the last 4 weeks to no avail.

car image   Automatic Transmission problem of the 2008 GMC Acadia 17
Failure Date: 11/19/2007

Turned down a road and felt something pop and then the transmission would not shift out of 2nd. Gear. Since then have had several issues with the transmission shifting to excessively. That some issues with extremely excessive shifting. Once my wife pulled out into traffic and the transmission would not shift causing a man in a truck to slid off of the road to avoid hitting her because the vehicle would not shift and go down the road. And also with the battery dying for no reason. This has happened 4 different times.

car image   Automatic Transmission problem of the 2007 GMC Acadia 18
Failure Date: 06/14/2007

I leased a 2007 Acadia on 5-24-07 and shortly after taking delivery I felt there was something wrong with the transmission and the way it shifted, I notified the dealership about the problem and took it in for repair. They told me they couldn't get the problem to repeat and felt there was nothing wrong. On 6-14-07 I took a trip to florida from michigan and got 11 miles into georgia and the transmission decided to shift into 1st gear going 70 mph. I managed to get off the road and was wondering what went wrong. I pushed the onstar button and they got me to a dealership (newton GMC in tennessee), they done a quick computer check for error codes and found many codes that they didn't know what they were but they said it was related to the transmission. I left the Acadia with them and finished my trip to florida in a Ford pickup. After 2 weeks the dealership got the ok from gm to replace the transmission. I am still having problems with the new transmission shifting correctly. As of 9-17-07 there is a new software update the dealerships will have to correct the shifting problems for 2007 models, the 2008 models already have the new software in them when they leave the assembly plant. This problem may be on the 2007 Saturn outlook because they have the same transmission.

car image   Automatic Transmission problem of the 2008 GMC Acadia 19
Failure Date: 01/01/1901

2008 GMC Acadia consumer wants to know if it's normal for a vehicle with automatic transmission to roll backwards when stopped on an incline. The consumer stated he took his foot off the brake and let the vehicle rolls backwards. The vehicle began to pick up speed as it rolled and very shortly, the engine stopped.