Upon turning my ignition off, the "shift to park" warning message appears, even though the display shows that I am in "P" and the brake is on. When I took it to the dealership, I got out of the car and pointed to the message on my display. Before the technician even looked into my car, he asked "shift to park"" so obviously this is a well known problem with this GMC repair center. My frustration is that if it is a known defect, why do I have to pay to have it fixed"

- Omaha, NE, USA

"shift to park" error when car is already in park. Issue started about 2 months ago; however, it is becoming worse and more frequent. Most of the time, pressing the shifter button in/out will turn the car off but not it can take up to 5 minutes of turning the car on/off and shifting gears to get the car to recognize that it is in park. (the dashboard does recognize that it is in park with the "P" beside the mileage but the sensor does not.) it is a safety concern because the car can not be turned off and locked. Despite only having the car for a little over 2 years, the dealership says the costs needs to be covered out of pocket since it was a loaner.

- Columbia, SC, USA

The contact owns a 2017 GMC Acadia. The contact stated that the vehicle would not shut off and the engine ran for hours. Eventually, the internal system recognized that the vehicle was in park and finally turned itself off. The manufacturer had not done anything to address the failure; however, they issued technical service bulletin number: 18-na-297 on December 13, 2018. The contact called numerous unknown dealers across the country to try to buy the part mentioned in the service bulletin, but the part was still on backorder. The part that was needed for the repair was the transmission shifter assembly (number: 13528228). The cost of the part was less than $150. The contact stated that the vehicle was out of its initial warranty. The failure mileage was 47,500. The VIN was unknown.

- Arlinton, TN, USA

I reported a problem over a year ago, and despite several trips to the dealer, the problem has gotten worse. The vehicle seems to shift to neutral while shifting from 2nd to 3rd gears. This results in a very harsh shift. The main safety issue is that while you are trying to accelerate, your vehicle goes into neutral and you nearly stop. Not only have I been slammed into my seat when it finally catches in the next gear, but I've almost been rear ended multiple times. It is very dangerous. The dealer claims it's "doing what its suppose to".

- Latham, NY, USA

When parking the vehicle and attempting to shut off, the Acadia gives the message "shift to park". the vehicle is clearly in park and I must start the vehicle again and shift to reverse or another position and turn off. The vehicle will not allow me to lock the vehicle and keeps power to the vehicle (draining the battery) until it recognizes that it is indeed in park. This has caused a stall and the vehicle to possibly still be in gear when parked leading to a rolling hazard. Has taken as many as 15 times for the vehicle to realize it is in park. General Motors has issued a tsb (18-na-297) regarding this issue, but is placing the cost of the fix on the consumer. This is a defective piece of equipment that has started a class action lawsuit.

- Concord, NC, USA

When you shift into park, the vehicle does not register as being in park. There is an indicator on the gauge panel saying "shift to park." This is a safety issue, the engine cannot be turned off while in this condition and it does not register the transmission as being in park. This happens every time the vehicle is shifted into park once the vehicle is stopped.

- El Centro, CA, USA

At random times, when parking my vehicle, after placing it in 'park' and shutting the engine off, the dic warns to place the vehicle in 'park' even when the shift lever is in 'park'. I have to start the vehicle again, shift the vehicle from 'park to 'drive' and then back to 'park', shutcthe vehicle off and the warning on the dlc goes away. This is starting to happen more often, every 3-5 start-stop cycles.

- Farragut, TN, USA

Shift to park recall - this is a safety issue. My Acadia was in park and I turned the car off and I got an error code that said action required shift to park. I had to turn the car back on put it in drive and back into park and turn the car off the stop the beeping. I spoke to flemington GMC and this issue is not a recall. This makes no sense to me the error code reads action required shift to park. Which clearly means the car is not in park if it's telling you to shift to park when you already put it in park and turned the car off using the start stop button. I am still waiting for a phone call from amber at GMC as I was suppose to be called on 9/3/19 regarding this issue.

- Branchburg, NJ, USA

When vehicle is shifted into park information center says vehicle is not in park and vehicle will not shut off. I have taking the vehicle into GMC service and they said it was okay to drive it and take it home. Since then we have had to get the vehicle towed back to the service dealership that said it was okay to drive because the vehicle died several times and would not start. There is a nation wide problem with this model ant the shifting not staying in park.

- San Antonio, TX, USA

I have a 2017 Acadia. When the car is shifted into park, the dashboard shows a warning that the car is not in park! it says I can't turn off the car until the car is in park, even though it's in park. After speaking to the service department at my dealership, they informed me that this is a very common issue and they bought in extra parts to repair the cars that come in. This first happened 6 months ago but only occured one time, now it is consistant and I am only 700 miles out of warranty so I am stuck paying for it out of pocket. After much research, I have found this to be an extremely common problem.

- Tipp City, OH, USA

Shift to park not recognized when vehicle stationary in park. Vehicle will not turn off or lock during this time.

- Gallatin, TN, USA

Shift to park when putting the car in park, it says shift to park and the vehicle continues to run and horn honks letting you know you are exiting the car with it running, after putting it in drive, neutral, etc and shifting it back to park, the message still displays.

- Painesville, OH, USA

The vehicle will not turn off. It keeps stating that it is not in park. Have moved shifter between gears repeatedly, the dash display says it is in park, the console says it is in park, but the vehicle will not turn off. This has happened on flat surfaces, and inclines. The end result is a vehicle that thinks it is on, wont lock doors, and kills the battery due to remaining in the on position.

- Ocala, FL, USA

2017 GMC Acadia displays "shift to park" when already in park and doesn't allow the vehicle to turn off the electronics. Problem was supposedly fixed under warranty when I took it in to the dealer in July of 2018. Now exactly 1 year later, now out of warranty, the "shift to park" message is happening again after the controller was replaced last year to fix the problem. Now that car is out of warranty, even though its such a common complaint now that GMC is aware of, the dealer is asking me to pay over $500 to fix it again. How do I know it will fix it this time? the last "fix" only lasted a year. GMC needs to issue a recall and fix their manufacturing defect.

- Lakeland, FL, USA

A "shift to park" message shows up after I have already put my vehicle in park which does not allow me to turn my vehicle off completely. I have 53,500 miles on my Acadia and had to have a new battery put in last week. A GMC dealership states the part to fix the shift lever is on back order but that they have heard this is a common issue with the 2017 Acadia. It is frustrating that GMC is aware there is an issue and that there has been a lawsuit filed regarding this however there has not been a recall issued.

- Kewaskum, WI, USA

Our Acadia on a 50% basis is complaining to the driver to "shift to park". this is even though the vehicle has been shifted to park. Took to the dealership today and they said they ordered the part but because this is a known issue there is none available right now and no idea when the part will be available.

- Eighty Four, PA, USA

When shifting vehicle into park, the vehicle still says shift to park and will not turn off.

- Billings, MT, USA

The contact owns a 2017 GMC Acadia. The contact stated that the gear shifter would not remain in the park position and the vehicle would not power off. There were no warning indicators illuminated. The vehicle was taken to norman gale Buick GMC (1247 NJ-10, cedar knolls, NJ 07927, (973) 975-4039) where it was diagnosed that the gear shifter needed to be replaced. The dealer stated that the part would not be available until September of 2019. The manufacturer was not notified. The failure mileage was approximately 26,000.

- Roseland, NJ, USA

Upon shifting the vehicle into park the onboard display will not show the vehicle in park. After reviewing multiple forums this is a common problem that could be a safety issue if the vehicle is not shifting into park

- Halstead, KS, USA

Shift to park issue. When you put the vehicle in park, the vehicle does not recognize that it is in park and displays on the information screen to shift to park. The vehicle will not allow you to turn it off because it thinks the car is not in park when it actually is. This was fixed under warranty for me in 2018 with 14K miles (replaced shifter assembly) and now I have having the same issue at 39K miles. GM needs to recall these vehicles and have the old shift assembly (P/N 84159722) replaced with the new shift assembly it created in October of 2018 (P/N 13528228) when my vehicle was serviced at 14K miles, it was replaced with the old part number 84159722 which is defective as I am having the same problem again at 39K miles. Now my vehicle is out of warranty and I am going to be expected to pay $700 to have the new shift assembly replaced. This should be a recall because it is a safety issue because it will not allow people to turn off their vehicles all of the way, which quickly drains battery and strands them.

- Liberty Township, OH, USA