Notes: Ahh, the ole' sophomore slump. The 2008 Acadia suffers from widespread transmission failure around 75,000 miles.


really awful
Crashes / Fires:
2 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
80,666 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2008 GMC Acadia drivetrain problems

drivetrain problem

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2008 GMC Acadia Owner Comments (Page 7 of 12)

« Read the previous 20 complaints

problem #114

Nov 292013

Acadia 6-cyl

  • 77,000 miles


Driving on interstate at 75 mph. Car suddenly lost power and slowed immediately. Had to cross lane in heavy traffic to get to side of road. Luckily did not get hit. Had wife and dog along. Stuck on side of road in cold weather for over an hour. Sudden loss of power on busy interstate was very dangerous. In reading forums on internet, this appears to be common problem. GMC needs to take responsibility for this common defect.

- Sioux Falls, SD, USA

problem #113

Nov 232013


  • 107,683 miles
Complete transmission failure. Fluid was checked and full after feeling the transmission slip moments before. Turned to go back home and the vehicle lost power. Thankfully we were not yet on the interstate and coasted off the road. Vehicle was towed to dealership where it was confirmed that the transmission was ruined and total replacement was required at a cost of $4200. After reading about the many issues with this vehicle and speaking to a mechanic who said they were always fixing major issues with this model/year we opted to trade instead. Didn't want to invest that amount of money and always be waiting for the next issue to arise.

- Toledo, IL, USA

problem #112

Nov 122013

Acadia 6-cyl

  • 88,500 miles
While driving our GMC Acadia we had lost our transmission with no warning. We were 300 miles from home and had to have the vehicle towed back to our home so we could figure out what had happened. Upon doing research we had learned that the wave plate inside the transmission had broke and destroyed the transmission with know warning sign. Fortunately enough I had just exited the freeway to pull into a shopping center for rest. The potential for this problem to happen while on the freeway would have had a much worse outcome and had the potential to be very dangerous to me and my family. I have learned through research that GM is aware of the problem and has refused to recall the vehicle to repair this issue. This is negligence on GM's part as they were advised by their own engineers to use a $30 wave plate, but do to cost effectiveness and negligence decided to select the $1.50 part that breaks down over time costing their consumers thousands of dollars in repair. To repair the wave plate is not costly, but when it breaks it destroys the transmission and it needs to be completely replaced at a cost between $4000 - $6000. This is completely uncalled for and GM needs to own up to their deficiencies. I have contact GM and advised them of my displeasure with their product and choice of parts. I was told that they are aware of the issue, but will not do anything to help their consumers.

- Hannibal, NY, USA

problem #111

Nov 092013

Acadia 6-cyl

  • 67,500 miles


Vehicle RPM's would start going up and down. Then there would be hesitation when you accelerated. I pulled out from doctor's office and it would not move in reverse or forward. Car had to be towed to a local mechanic.

- Huntersville, NC, USA

problem #110

Nov 052013

Acadia 6-cyl

  • 76,607 miles
While merging onto the highway the vehicle was revving up, but not speeding up. I would take my foot off the accelerator for a second and then try to accelerate again. The gear would sometimes "catch" and sometimes not "catch". the mechanic discovered that the one cooling line was corroded and another was "sweating". the transmission, torque converter, and cooling lines all had to be replaced. I think its a premature time for my vehicle to need a new transmission with only 76K miles as the vehicle is well maintained.

- Queens Village, NY, USA

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problem #109

Nov 142013

Acadia 6-cyl

  • 55,600 miles
I was driving home when my transmission suddenly started to lurch and hunt for gears, then hesitate. My car then wouldn't move forward nor would it go into reverse. Two codes showed up when I had the vehicle scanned, P2715 and P0700. After doing research I concluded the wave plate in my transmission had failed. My vehicle is no longer drivable. Thankfully I wasn't on the freeway when this incident happened because once the transmission quit the vehicle came to a stop rather quickly. In reading reports online it appears transmission failure of this particular model is highly probable and that GM knows it's an issue but has refused to recall the vehicle.

- Oakdale, CA, USA

problem #108

Nov 142013

Acadia 6-cyl

  • Automatic transmission
  • 59,000 miles


The contact owns a 2008 GMC Acadia. The contact stated that the vehicle suddenly failed to accelerate. The vehicle was taken to the dealer where it was found that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was contacted about the failure. The failure mileage was 59,000...updated 12-30-13 updated 1/22/2014

- Hoover, AL, USA

problem #107

Nov 132013

Acadia 6-cyl

  • 99,728 miles
I purchased a used 2008 GMC Acadia in December 2012. At time of purchase, the vehicle car fax report was clean and indicated one previous owner. The vehicle mileage at the time of purchase was approximately 81,000 miles. My personal mechanic inspected the vehicle prior to purchase and also gave the vehicle a clean report. For the first 11 months of ownership, this vehicle ran like a champ. Today, at 99,728 miles (mostly highway mileage on my behalf) I find that I am having to replace the entire transmission (rebuild) at an out-of-pocket expense of $4,300. I called the GMC dealer where I purchased this vehicle and they advised that there were no recalls/warranties available on the transmission. They also advised that in the event the entire transmission needed replaced, that the cost would be in the vicinity of $4,500 and they were able to provide this estimate with certainty because "they had just completed a rebuild on another '08 Acadia last week". I find it highly disturbing that at only 99,728 miles, and 5 years of age, a transmission completely gives out. I am also disturbed that with the number of complaints out there on various internet chat forums regarding this vehicle and specific model, that GMC, to date, has yet to issue any recalls or extended warranties. I felt it necessary to report this matter as soon as possible. I will be getting in touch with a class action lawsuit attorney to look into this matter further because I genuinely am concerned that GMC should be held accountable if the number of people out there with the same issue have found there checkbooks much lighter as a result of this.

- Hamilton, OH, USA

problem #106

Nov 082013

Acadia 6-cyl

  • 58,500 miles
I just had my transmission fail on me yesterday. Luckily it still had 1st & 2nd gear, unfortunately I'm 5yr-8months into it at 58xxx miles. Sounds like I'll be paying for this one. If there is any info out there on recalls. From what I've been reading online, it seems there is a real problem with this transmission (6T70) in the early years. I imagine as more and more '07 - '09 Acadias (traverse, enclaves & vues) get into the 50K+ mile range the transmission problems are really going to start spiking up. It would be a real shame if GM chooses to ignore the obvious and push this problem back on to their customers.

- Washington, DC, USA

problem #105

Nov 112013

Acadia 6-cyl

  • 67,358 miles
I was driving on a major highway. The car would not change gears to accelerate. When I got home the car would barely move when I tried to back into my driveway. The engine revved as if the car was in neutral. This transmission failure could have caused a serious or fatal accident, as the speed limit was 55 and I had no warning that the car would not accelerate when expected.

- Coatesville, PA, USA

problem #104

Jul 212013

Acadia 6-cyl

  • 52,000 miles


3/5/R wave plate transmission failure - I was traveling out of state and my 2008 GMC Acadia stopped in it's tracks without any warning. Vehicle was running, but it would not move. I was stranded on the side of the road, at night with 3 young children, over 5 hours away from home. Vehicle was towed to the dealership the next morning and 3/5/R wave plate failure was determined, new transmission required. Less than a week prior to the cross country trip, vehicle was at dealership having oil change and other preventative maintenance completed, no issues noted at that time. Major safety issue that needs to be investigated.

- Sugar Land, TX, USA

problem #103

Nov 022013

Acadia 6-cyl

  • 91,687 miles
I was turning left at stop light. The transmission failed to shift and stalled causing me to be struck. This could have been a fatality if traffic were heavier. I have since researched and found that GM has had thousands of complaints regarding the transmission problems. This could have been prevented had GM recalled a defective valve located in the side box (according to mechanic at GM dealer this is why I stalled out). I am seeking an attorney for a class action lawsuit.

- Columbia, SC, USA

problem #102

Nov 032013

Acadia 6-cyl

  • 74,250 miles
Transmission went out while driving on the interstate. We were able to pull-over and get out of the way of the high speed traffic. No accident occurred, but it could have been a serious situation that caused several accidents.

- Sheridan, WY, USA

problem #101

Oct 262013


  • 99,000 miles
I was driving by myself with my 3 children when my transmission went out. I have kept up with all maintenance and even had a transmission flush done 4 months ago, just to have the transmission go anyway. GMC customer service will not help (the car is only 5 years old) but said it was in service in 2007, so no warranty coverage. There are several hundred complaints on the same issue with no one willing to do the decent or right thing. There should be a recall. We have had several issues with this vehicle. We have four children so we need this car. We cannot afford to pay thousands of dollars to have something fixed that is an obvious ongoing issue with these vehicles. Please consider investigating this. This truly is an issue that GMC should be accountable for.

- Plainfield, IL, USA

problem #100

Oct 222013

Acadia 6-cyl

  • 78,551 miles
I noticed that the gears felt like they were slipping. Rpms would go up by 1000-1500, then the vehicle would engage in gear. I noticed this very sporadically a few days before I took the car in, but it steadily got worse. I called the dealer and parked the car until my service appointment even though there were no warning lights on the car. After making the service appointment, I researched Acadia transmission issues on the web, and found lots of complaints about the 35R wave plate. Turned out this was the source of my issue as well. Transmission had to be completely dis-assembled to clean out the debris. Totally unacceptable for a 5.5 year old car with less than 80K miles to need its transmission rebuilt. Given the number of complaints about the 35R wave plate, please open an investigation for a recall.

- Zionsville, IN, USA

problem #99

Sep 202013

Acadia 6-cyl Diesel

  • 57,000 miles
Transmission stopped working and wont let the vehicle move. This vehicle only has about 57,000 miles! by reading on the internet it seems I'm not the only one with this issue. GM has not issued a recall on this yet.

- Santa Maria, CA, USA

problem #98

Oct 222013


  • 66,751 miles
Had a complaint with the transmission not downshifting adequately on 10-25-2010 and courtesy GMC reprogrammed it... under warranty. For about a week prior to 10-22-13 the car was not driving right with the shifting acting up so I brought it in and as I was in the process of getting my car to a service car center it would quit running, but I got it in the shop in time before it stopped for a third time. It acted up on highway 90 while doing 57mph and again at doing 45mph and when I slowed down to turn into the service center. The service center (dave's), after checking it out, brought it in to A-abal transmission for me since I was afraid to drive it in case it didn't make it. My transmission had to be completely rebuilt ($4205) at my expense (had multiple broken parts) since my warranty was up in March. Calls were made to GMC with no aid in helping me with this problem. Upon research I found out that the Acadia's transmissions have been known to breakdown between 50,000-70,000 miles in cars purchased in the following years... '07, '08 and '09 (a problem they knew about). The complaint list is long. I don't understand why GMC has not stood behind their product since it has placed consumers in dangerous situations (read multiple complaints).

- St. Martinville, LA, USA

problem #97

Oct 262013


  • 78,500 miles
Wave plate transmission failure 2 months after purchase and 5 months after warranty. So disgusted!!!

- Pipestone, MN, USA

problem #96

Sep 232003

Acadia 6-cyl

  • 93,000 miles
GMC Acadia, catastrophic engine failure, and steering system. 23 Sept 2013, while driving my GMC Acadia, and the vehicle shut off after a loud nose came from the engine, Tuesday 24, 2013, SUV towed to private repair shop. After attempting to start the vehicle and checking the SUV out, I was told that they would not go further because they believe the vehicle needs a new engine, I call GMC and talked with [xxx] a problem specialist, arrangements for vehicle to be check out at ?hennessey GMC. Poc, [xxx], I have met with before in regards to a recall, and told him on multiple occasions that I heard some sounds coming from the engine, I was told they did not hear anything. 25 Sept 2013 SUV left at shop, [xxx]would call me that day. I didn't hear from him, 1 Oct 2013 I stop by hennessey, on the SUV's problem, spoke to [xxx], I stated that I been waiting for his call, they were still checking it out, but GMC only paying for one hour, to open up the engine, it may cost $500 to $ 600 dollars. I can not afford to purchase another vehicle. Army motor sergeant/ master mechanic, responsible for (aoap), army oil analysts program, this uses labs that analyze the oil pull from "engines, transmissions, of vehicles such as GMC, Ford, Chrysler, and other manufactures. 3,000 miles or bi-annually vehicles I.e. hummve. The military learn decades ago that vehicle manufactures will delivery vehicles with defected parts, such as engines, transmissions, that can be out of tolerance. The army started pulling oil samples, and sending them to the labs for test, for water, metal, and any other foreign matter, this help to identify issues in the engine before the "warranties expired. So the suggested failure that manufactures placed on vehicles that covered their bottom line. $2,000 credit to purchase a new vehicle from them is a insult, I have this in writing. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Jonesboro, GA, USA

problem #95

Oct 042013

Acadia 6-cyl

  • 95,500 miles
We bought vehicle from hendrick Toyota on 6/15/2013. My wife began driving to work when it completely stopped in the middle of the road. She was frantic because of the busy street and thankfully, our kids were not in the vehicle. Car was towed to hendrick where it was determined that transmission failed. It was told to me that the wave plate in these vehicles was known to fail and after research and a technicians affirmation, apparently GMC never tempered this particular part and have known about the issue for quite some time. Again, after researching, I've seen countless complaints/issues of people with the same thing happening and that GM and their service and customer satisfaction departments quite simply explain it away as "well, there's nothing we can do" despite, what appears to be, clear evidence that this major power train problem has been completely ignored. Now, I'm looking at a bill of $3000+ (dealer cost) to repair and from what I've seen, others are having the vehicles fixed at least the $4000. I will do whatever I can to recoup any repair costs that this major issue has caused. It is beyond frustrating that I only had the vehicle for about 100 days and not even 3000 miles on it (after the 90 day/3000 mile warranty had expired) to only fork out thousands of dollars for an issue that a major automobile company should have recalled. I can tell you that through this experience, I will never purchase another GM vehicle again because of their incredible lack of consideration to make this right with all that have had this issue. I hope to hear from someone very soon in regards to this matter. It's unfortunate that many people have suffered a great financial loss because of a clear decision by GM to avoid correcting this powertrain problem. I appreciate your time and efforts.

- Cary, NC, USA

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