2008 GMC Acadia: stuck in gear or won't shift

Filed Mar 14, 2026 · Engine · PA

The car would not shift causing me to pull over on the side of a highway to restart the car this happened 5 times in a row b4 the car would shift into proper gear

Filed Apr 30, 2024 · Transmission · PA

Transmissions will not shift out of 1st gear. And puts out a 752 code. This can happen at anytime. Vehicle will suddenly lose power at any time.

Filed Mar 1, 2020 · Driver assistance, Electrical · AR

Will not shift out of park

Filed Dec 3, 2019 · Engine, Transmission · 110,000 miles · CA · crash

Transmission failed, transmission slipped out of gear, transmission stuck in first gear, gm approved a 2013 safety recall for this vehicle, the transmission failed in 2017, the transmission was repaired and the entire engine has been replaced twice. The transmission is failing again because it is a product defect that is dangerous. Gm has refused to repair or replace the vehicle and the autonation has refused to repair or replace the vehicle. Gm and autonation have sold a dangerous used car with a fraudulent intent. Gm and autonation have ratified the intentional fraud. The car needs to be replaced immediately because it is still dangerous to drive and the transmission is currently failing again.

Filed Jul 24, 2018 · Transmission · 85,500 miles · MI

My vehicle has 85,500 miles on engline and transmission. I bought the vehicle when it had 36,000 miles on it. I have never pulled anything behind my vehicle that would put strain on the transmission. I took it to the mechanic and found out I needed a new transmission. The vehicle would stay in 1st gear and would not shift to a higher gear.

Filed Jul 22, 2016 · Engine, Transmission · 85,000 miles · WI

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.

Filed Apr 19, 2016 · Transmission · 143,000 miles · MI

While driving, the vehicle began to idle sporadically. Eventually, it started to idle and not shift into the next gear. Finally, the check engine light came on. When took it to a repair shop determine the codes associated with the check engine light, and found p0700 and p0776 codes. These codes reference a well known problem encountered in the 2008 gmc acadia. The waveplate may be broken, and cause issue in the 3rd, 5th, and r gears. So, now the vehicle doesn't shift into any gear, and I will have to pay out of pocket ($4k) for an issue that gm knows is an issue, and has since corrected in the later year models. I called gm to see if they would offer any type of assistance, and was told no, due to the mileage on my vehicle. I am currently at 143,000 miles. Regardless of the miles on my vehicle, if gm placed a faulty part in their vehicles, they should be required to place a recall to fix it, and not have it be the consumer's responsibility!

Filed Jan 28, 2016 · Transmission · 100,000 miles · OH

Tl* the contact owns a 2008 gmc acadia. The contact stated that while operating the vehicle the transmission would intermittently became stuck in gear and the vehicle would not drive forward or in reverse. The vehicle was restarted and operated as normal. The vehicle was taken to the dealer, who diagnosed that the transmission and warmer plate needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 100,000.

Filed Jan 18, 2016 · Transmission · 115,000 miles · AL

Purchased vehicle from dealer with 72000 miles with 4yr/48000 mile warranty. Warranty ran out this summer, mileage is now 133000 miles. Problem has been intermittent since early last year, but mechanics were not able to help because problems were not 'presenting' as the check engine light would go on and off at different times (just as the recalled service air bag light did!). In december 2015, the check engine began staying on all the time and the gears did not shift correctly. The TCM is messed up, which is a very common problem with all acadias, apparently. We had a very scary issue on xmas eve with the gears downshifting while we were on the highway and it wouldn't let me go over 20mph! We took it to first dealership over an hour away and the guy came out with a handheld computer, put in on our car, said it is our TCM and $3800 to fix it. He never put anything in the computer, so we didn't have an official diagnosis. We spoke with gm and they said to get the diagnosis and they would see about helping us to cover it. So, we got the diagnosis today, it is the TCM and no help. They said it is out of warranty, gm won't cover it, it is up to the dealer to cover it, etc. We have been told so many different stories about why they won't cover it, just that they won't. Our VIN number is literally 6000 off of the recall list! It is a common problem and should have been a national recall! Does anyone know of a class action lawsuit? I would love to be a part of one.

Filed Jan 5, 2016 · Transmission · 90,000 miles · NJ

The transmission in my 2008 gmc acadia is currently at the dealer with codes po752 and po700 which are the shift solenoid and the transmission control system. I was stuck in first gear driving the truck. The federal safety agency reference #10052215 and tsb reference #sb-13120 explains the exact problem that occurred with my truck. Gmc and the dealer are saying that I have to pay approx. $2500.00 which is a 65% to 35% split with the dealership ( mine being the 65%). I shouldn't have to pay for a safety issue that has been clearly identified by the federal safety agency. I am just another dissatified customer with gm and would like to add my experience and truck problem to your data base. This problem has been happening for the past month or so. Also, there is already a recall that gm has sent out on the wave plates located in the transmission. Which they have extended the warranty to 10 years or 120000 miles. The wave plates are beginning to wear causing premature debris in the transmission causing the solenoids to stick. Although the dealer is saying the wave plates are not worn.

Filed Jul 17, 2015 · Transmission · 83,000 miles · AE

My husband was driving our 2008 gmc acadia and the power train started to make a whining noise, when the gearbox shifted the noise stopped. A minute later he stopped and then when he tried to proceed forward the vehicle would not shift into any gear and the car would no longer drive. We had several people in our vehicle, mostly kids, and had to recruit bystanders to help us push the vehicle off the road to a nearby parking lot. This is a huge saftey issue! My family had to stand on the side of the road while my husband and some gracious strangers had to push the vehicle since it was no longer drivable. And they we had to wait for someone to come get us. I have seen several complaints with the same scenario and really think this issue needs to be investigated. And this worst part to this whole situation is that we are military and are currently stationed overseas and will cost us over $5000 just to have the part shipped here.

Filed Jul 7, 2015 · Transmission · 78,000 miles · FL

Numerous uncommanded gear changes....car became stuck in 2nd gear....moved to right lane of interstate highway...event occurred during heavy thunderstorm....car almost uncontrollable....finally came to an exit...car creeping along....pulled into service station and stopped at pump...when trying to restart....car would not go forward...I was able to back to clear the pump...very scary incident...internet reveals numerous incidents of a similar nature...all were involved with 2008 gmc acadias. Incident occurred sunday 5 july 2015. Unable to enter date of incident