Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety. Notes: Ahh, the ole' sophomore slump. The 2008 Acadia suffers from widespread transmission failure around 75,000 miles.


really awful
Crashes / Fires:
0 / 2
Injuries / Deaths:
2 / 0
Average Mileage:
81,451 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 engine problems

engine problem

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2008 GMC Acadia Owner Comments (Page 1 of 4)

problem #71

Sep 072016


  • 73,126 miles


I noticed a leak in my driveway under my 2008 Acadia. I immediately took it to dealership so they could find out where it was leaking. They found the engine leaking in several places including the front cover. In addition to the engine leaking, they also found the water pump to be leaking and in need of being replaced. While putting new seals in the engine, they found that the timing chains were showing signs of wear as well. All in all, the car needed several seals replaced, the timing chains replaced, the water pump replaced, and the power steering pump replaced. The car only has 73000 miles on it!

- Coeur D'alene, ID, USA

problem #70

Jul 292016


  • 127,000 miles
While driving at interstate speeds in 90+ degree weather, the 2008 GMC Acadia experienced a complete loss of power. Engine quit along with all electronics, power steering and power brakes. Let car sit for 20 minutes and it started up and drove fine for a week or so then the same issue occurred again. This has happened 3 times within 5 weeks. The vehicle has been into an independent mechanic and two dealerships. Of those dealerships, we have taken the vehicle to the local autonation GMC dealer 3 times over the course of 2 weeks and all groups who have looked at the vehicle stated that they could not find and "codes" after running the computer diagnostics. We have requested an on-board diagnostic computer to be ordered from autonation GMC park meadows (co) but have received no response. This is a very dangerous issue while driving at highway and interstate speeds. Have researched other consumers with the same situation on the NHTSA website.

- Centennial, CO, USA

problem #69

Oct 152015


  • 85,000 miles
Oil changes at dealer performed every 3K miles. At 88K miles, shortly after drive train warranty expired. The check engine light appeared. Full diagnostics performed by local dealer stated timing chain buffers were beginning to fail. Est cost $3500. Advised that since the light comes on/off intermittently, okay to wait to see if problem worsens, which may be many years, if ever. At 92K miles, while on highway, the transmission wouldn't shift gears, RPM's climbed, pulled over vehicle where it stalled and wouldn't restart. Vehicle towed to dealer, where tested and determined that engine needs replacement due to loud metalic engine noise and metal shavings in oil. Estimated repairs from two GMC dealers of $6600 to $7600 for re-manufactured engine. Local dealers have stated that timing chain buffers is a very common problem with 2008 GMC Acadia and vehicle should be recalled, but is not due to the cost of engine replacement. Contacted GMC (belva - senior case analyst) to describe case and they responded that they will not assist in the repairs because: 1) vehicle was purchased used - stating that all such purchases are 'as-is' from dealer and its up to the consumer to do due-dilegence before purchasing, 2) vehicle power train warranty expired by date shortly before purchase, and 3) power train warranty is now 3 years past the date, regardless of when issue first appeared. GMC senior advisor also stated the she recently purchased a used GM product, and the engine failed shortly afterward at 100K miles, and GM will not assist her either, as that is also out of the date range of the power train warranty. Engine was manufactured in the K-GM (saint catharines, Ontario) plant.

- Stoughton, WI, USA

problem #68

Jul 012016


  • 7,600 miles


Purchased new, have had the following problems 2011 :water pump failed, and engine oil leak new pump and gaskets,2012: Oil pressure sensor replaced, 2013: Wave plate broken sent metal through transmission major transmission repair, front and rear A/C failed and needed replacement. 2014: Master cylinder leaking - replaced. 2016: Purge solenoid stuck open was replaced, oil leak- timing cover leaking (did not replace- too expensive)- multiple calls to GMC and dealing with the dealer not satisfied and feel the car is a safety risk.

- Los Gatos, CA, USA

problem #67

Jun 012015


  • 86,000 miles
My 2008 Acadia is now on it's 4th thermostat. I'm about to send it in to have it replaced. My SUV keeps overheating. So far I have replaced the radiator, thermostat, and stability track. Is there any one else who has this problem?

- Romeoville, IL, USA

problem #66

Jul 152013


  • 50,000 miles
The contact owns a 2008 GMC Acadia. The contact stated that the check engine light was illuminated and there was an abnormal ticking sound coming from the engine. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the timing chain needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 50,000...updated 05/19/16

- Herndon, VA, USA

problem #65

Mar 312015


  • 110,000 miles


The contact owns a 2008 GMC Acadia. The contact stated that the vehicle experienced a complete loss of power and was no longer operable. The check engine warning indicator illuminated. The contact took the vehicle to the dealer where it was diagnosed that the transmission malfunctioned and needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was towed to an independent mechanic where it was diagnosed that the engine was defective and needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was taken to the independent mechanic again where the engine was replaced again. The failure recurred. In addition, the engine oil coagulated and the air bag light remained illuminated. The manufacturer was notified of the failures. The failure mileage was 110,000.

- St.Petersburg, FL, USA

problem #64

Mar 012015


  • 50,000 miles
The contact owns a 2008 GMC Acadia. While driving at an unknown speed, the contact noticed an abnormal odor emitting from the engine compartment and the engine warning light illuminated. The vehicle was taken to a dealer who was unable to diagnose or repair the vehicle. The manufacturer was notified of the failure. The failure mileage was 50,000.

- Richmond, TX, USA

problem #63

Jan 222016


  • 87,000 miles
While driving the vehicle at a normal speed (55) on a highway, a dinging sound comes on and the car goes into reduced power mode, losing speed. The stabilitrak and the traction control warning comes on. This makes it difficult to cross traffic at intersections as the car will barely accelerate. There is no warning that this is going to happen. Also, the cars behind you do not know why you are slowing down. Then when you turn the car off and restart it, the lights go off and the car drives fine. After three trips to the GMC dealer, the throttle body was determined to be the problem. GMC has issued special circumstances warranty on the 2007 & the 2009 but not the 2008. I do not feel that the warranty is sufficient. I do not understand why there is not a recall because after searching the forums, I have found that there are numerous complaints with this happening. I had my grandkids in the car with me and we could have been hurt when we had the sudden loss of power we experienced.

- Mauk, GA, USA

problem #62

Jan 292016


  • miles
My wife was driving down the highway and the car suddenly would not go on a high volume highway. It turns out the transmission solenoid block went bad. I have looked into it and there has been many complaints of same year, model, and make. My wife and children were in the car and wereally very distraught.if there is so many complaints on this vehicle for the same very expensive problem, why not recall. $4000.

- Wentzville, MO, USA

problem #61

Nov 082015


  • 158,956 miles


Driving car on freeway and it caught on fire, no previous issues that would cause the fire. Front of car and engine compartment caught on fire....updated 01/25/16

- Dallas, TX, USA

problem #60

Nov 182015


  • 100,000 miles
I made a previous complaint filed here under NHTSA id number: 10765088. The local garber GMC dealership sealed the sunroof and cleaned the clogged hoses that drain water from the roof. They also replaced the passenger side airbag for a total of $600. They gave a guarantee that there would be no more leaks. On November 18 the car began leaking from the front passenger side airbag area and water poured from the roof onto the glove compartment when I made a full stop. Currently awaiting a return call from the service manager of GMC dealer. I have video of the problem. I was driving in the rain from one college campus location to another, in other words many stop and go and side streets at 30 mph or less. The car made squealing noises as well which happened last time too (September of this year).

- Port Saint Lucie, FL, USA

problem #59

Oct 062015

Acadia 6-cyl

  • Automatic transmission
  • 105,000 miles
The contact owns a 2008 GMC Acadia. The contact stated that oil was leaking from the front of the vehicle. The vehicle was taken to a dealer where it was diagnosed that the oil was leaking from the timing chain cover. The timing chain cover needed to be resealed, but the vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 105,000. Updated 04/08/16

- Sanderson, FL, USA

problem #58

Oct 302015


  • 75,000 miles
In 2010 I noticed an oil leak from the front of engine. After seeing the notice on the internet about oil leaks can cause engine fires I became concerned. Please advise! thanks!!!

- Hope Hull, AL, USA

problem #57

Sep 142015


  • 96,000 miles
At 96,000 miles my transmission went out completely. I had to replace it, and it cost me over $2500K this is insane.....and they are known for the 2008 transmission failures. The dealer refused to help in any way....

- Bellflower, CA, USA

problem #56

Mar 092015


  • 93,548 miles
After a couple attempts to address service engine issues with local mechanic, the car continued to display codes and then would not consistently shift into 2 or 3rd gear. We took the car to a GMC dealer and they found that the transmission control module needed replaced (code P0752) as did the shift solenoid. Check engine light was also related to stretched timing chains which were replaced since first issue required the engine be removed for repairs to be made. I noticed many complaints online for transmission issues and saw recalls for 2007 Acadia's but not 2008, in my opinion 2008 should also be included. Total bill $2,960 with two 10% discounts from dealer since they felt bad for me.

- Harleysville, PA, USA

problem #55

Aug 072015


  • 104,371 miles
I was driving on I5 to North from California and the car stop working just like that!!! I just feel a big push and the stop working

- Beaverton , OR, USA

problem #54

Jul 102015


  • 84,400 miles
My transmission went out on my car at 84,400 miles.

- West Lafayette, IN, USA

problem #53

Sep 152014


  • 115,000 miles
During acceleration the vehicle vibrates when going between 35 and 45 mph. Was not able to reproduce issue at dealership last fall, but is now getting much worse. Happens almost everytime the vehicle accelerates.

- Elizabethtown, KY, USA

problem #52

Jul 042015


  • 155,125 miles
Engine block developed a crack that allows coolant to seep through block.

- Perry, MI, USA

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