When the car is intentionally stopped and shifted into park, the dashboard shows a warning that the car is not in park. It requires moving the gear shift in and out of drive until the electronics recognize the car is in park. Until then, all the car electronics remain active. When the door is opened an alarm sounds because the electronics thinks the car is not in park. The GMC dealership is aware of the problem but claims the parts needed to fix it are unavailable. This first happened over a year ago, but the dealership couldn't recreate the problem. It has started happening again, and the dealership has recognized the problem, but claims the parts are unavailable.

- Galveston, TX, USA

2017 GMC Acadia has 'shift to park' error for the last 6 mths. Will not acknowledge the car is in park and will not turn car off completely. It has caused other issues with the car like battery/car hesitating to start in the morning. Also the radio/bluetooth not disconnecting after turning car off. You have. This is a long process to get the car to realize it is in park. After turning car on and off, shifting car out of park and back into park. And also wiggling the shift gear. This after knowing it is an on hoing issue for well over a year is still not a recall and they still have not made a fix for this.

- Navarre, FL, USA

The "shift to park" message comes on after I park the car. I have to wiggle the gear shift back and forth to get it to go off or the car stays on electronically. The door locks go on/off (and up and down) while driving (purportedly due to the car going in and out of park while driving) which is a major safety concern. Because it's out of warranty (47,000 miles) my dealership said it would be $700-$800 to fix the problem although GMC has put out a bulletin to tell the dealerships how to fix it. This should be a recall due to safety concerns. If the car isn't reading it's in park, it could roll and cause injury and damage. This has happened pretty regularly for 2 weeks going on 3 weeks.

- Commerce, GA, USA

My 2017 GMC Acadia has a "shifter" problem. I put the car in park but I get an error message that states "shift to park" and the car doesn't completely turn off even though you turn the car off physically. Some electronics stay on like the radio and headlights. You cannot completely shut the car down - again - even when you physically turn the car off. The car is in park and stopped.

- West Chester, PA, USA

Vehicle warning light says "shift to park" when car is stopped and shifter is put into park. Vehicle will not shut down properly.

- Beebe, AR, USA

Vehicle states, 'shift to park, ' when trying to turn off engine when it is already in park. Turn vehicle back on and have to shift multiple times out and then back into park before car will recognize it is in fact in park to shut down entire engine. Have replaced battery once already. Vehicle is stationary and foot is on break when trying to turn car off. Has been happening since purchase but, just got fed up with it.

- Liberty Twp, OH, USA

When car is placed in park, the dashboard display says that the car must be shifted to park, although it is has been put in park. The car must be restarted, and reshifted to park, multiple times. (as many as a dozen times.) when the error message appears the electrical components do not shut down. The car cannot be locked. Unsure whether car is/ is not actually in park, or whether there is a danger of car rolling away.

- New Holstein, WI, USA

I am getting a message shift to park! on 2017 GMC Acadia after putting my vehicle in park unable to lock car and lights and radio remain on. It took me more than an hour to get my vehicle to stop displaying message. I am very concerned and appalled at the same time upon investigating I have discovered GMC is aware of this problem and does not have a fix for it. I really wished it would have been revealed and I could have chosen another vehicle that is very bad business practices my vehicle is only two years old and I am still making payments.

- Raleigh, NC, USA

When putting the vehicle into park, an error is displayed stating to shift the vehicle into park, even though the shifter is in P. in order to get this message to go away, I have to move the shifter up and down multiple times. Could take up to 20 min to get the error to go away. I can not leave the vehicle until the error is off because the lights stay on and will drain the battery. I also notice that the vehicle rolls a little more after multiple attempts to get error message off. This is concerning that it may not realize its in park and roll into another vehicle causing damage to both or roll away. I took to my dealer and was told this is a 'known' issue and is not covered under warranty, nor is there a recall. I just paid out of pocket for new tires because GM knew the tires placed were 'wearing' too soon based on mileage. Now, I am being told I will have to pay about $600 to get this fixed. GM knows of issues and not fixing them is wrong. This is not a new issue, has been listed as complaints for the past year, yet GM has done nothing to fix and continue to make the vehicle with the same issues. Frustrating that I have to spend the money to fix an issue they know about! this needs pushed back to GM to hold them accountable and make this right. The shifter issue should be a recall and fixed.

- Plain City, OH, USA

2017 Acadia is displaying 'shift to park' message when the car is in park. I have to turn the car off and on and shift to other gears and back to park upwards of 5/10 times pretty much every time I try to turn the car off.

- Clinton, NC, USA

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