Vehicle does not recognize that it's in park. Once parked a warning comes on telling you to shift to park. The vehicle does not completely shut off because it does not believe that it is in park.

- Delaware, OH, USA

The thermostat stops working and my a/c stops blowing cold air, and driving assist stops and engine light goes on. It is a rampant problem among GMC Acadias with no reason or fix. Please advise.

- Naples, FL, USA

The vehicle would intermittently display a "Shift to Park" message and sound alert chiming when moving shifter to park position. The car could not be parked until the chiming and message were dismissed by jiggling the shifter, sometimes after a prolonged battery-draining attempt to end the condition.

- College Station, TX, USA

When turning off engine it displays "shift to park" and won't shut off. This has been ongoing since I purchased vehicle but is much worse now

- Volant, PA, USA

Vehicle does not shut off when shift to park. Must put vehicle in gear then shift to park numerous times in order to get the vehicle shut off. Vehicle will not start. Requires numerous attempts applying brake to start

- St Paul, MN, USA

After shifting to park a message comes in screen that is telling me to shift to park I have put it in park so then I have to restart vehicle and move gear shifter back into park sometimes it works on 1st try then sometimes takes extra try-??s to get it to clear

- Ponca City Ok, OK, USA

Shift to park and unlocked shifter knob, the shifter knob is capable of shifting from drive to neutral without pressing the unlock switch on the shifter while driving. Vehicle says shift to park when parking vehicle, car will not shut off or lock when code is up.

- Dexter, MO, USA

Stabilitrak Warning keeps showing up on dashboard as I turn my vehicle certain down certain roads, round abouts etc like my car shifts or makes it hard to control going around/through certain road conditions.

- Conway , AR, USA

When placing the car into park, dash indicated that the car was not in park. So, emergency brake had be utilized until the problem was determined by a GMC dealer rep. When asked, the rep did stated that this problem was happening with these vehicles. Safety of driver or others was definitely put at risk, car could have rolled out of my driveway or if parked elsewhere. Definitely felt unsafe operating this vehicle. This was happening on a regular basis prior to scheduling an appointment, approximately 2 weeks. Appointment was made at dealer and it was determined that floor shifter had to be replaced. Failure to be able to get the car in park indicated as above. This should be a recall and not a financial responsibility of owner.

- Lavallette, NJ, USA

When I put the vehicle in park to exit the vehicle I get an alert on the dash that says to put the vehicle in park. The vehicle is in fact parked but I can't shut it off or lock it. I have searched and found that there was a class action lawsuit but no recall. The dealership keeps telling me that there isn't a fix for the problem.

- Riverview , FL, USA

Water is leaking down back window from 3rd break light. Seal is bad/crushed was never put in right

- Wheatfield, IN, USA

When I put the vehicle in park and then turn off the engine, a warning comes on the dashboard saying -€œshift to park-€ and the electronics will not turn off or the lights and I cannot lock my doors. I cannot leave my vehicle until it goes off. Sometimes it is only a few seconds and can go up to a few minutes. I noticed this problem when I bought the vehicle in 2020 and is a recurring problem and is becoming unbearable that want to trade this vehicle in because I do not want to deal with it.

- Oceanside, CA, USA

My 2018 GMC Acadia does not detect that it is in park. The vehicle does not shut off even though I put it in park. I have to wiggle the shifter and play around with it until it detects that it is in park. The dealer is aware of this issue and I did have the entire shifter replaced. This happened the first time at around 30k miles. It has been a little over a year and it is happening again. The fix only seams to be temporary. I am afraid that the car will not detect is in park and keep rolling. This could be a serious issue. GMC is aware of the issue and they have no fix for it. There are already various lawsuits and complaints about this shift to park issue.

- Schererville, IN, USA

The gear system fails to recognize when the car is in park. I have had the gear box replaced once on this car, and it is failing again. The car has 92000 miles. The problem is that I cannot shut the car off completely or lock it because the system does not recognize that the car is in park. My dealer told me last time that the problem is caused by a faulty sensor. Now it's happening again. This is a major issue and GMC needs to correct it. Thankfully I bought an extended warranty so they will have to fix it again, but this is absurd. No other car I've had has ever had this issue.

- Mckinney, TX, USA

Had to replace the shifter, harness, and parking assist module to the tune of $1569! When it was put into park the system would not acknowledge it was in park...therefore I could not lock the vehicle and an alarm kept going off. My Acadia only has 12,000 miles on it...NO excuse for having to replace those parts with or without a warranty! Dealership said I am not the only one this has happened to...they have replaced a number of them!

- Las Vegas, NV, USA

Shift to park notification keeps coming on after shutting off the car. It obviously has been shifted in to park before turning off the engine, but the notification keeps popping up. I have had the shift harness replaced by a mechanic once alreafy. He says this is the GMC authorized fix. IT DID NOT FIX THe PROBLEM! Of course, he'll put another shift harness for me, but what are the odds that will solve anything. GMC needs to come up with a better solution! It is frustrating and time consuming trying to come up with whichever trick will work to make the notification to away. I am not a very happy customer!

- Marcus, IA, USA

when the car is in park it thinks its still in gear and there is an alarm that says "SHIFT TO PARK". Car cant be turned off. It rolls. its unsafe. It was repaired once for this in 2019. It came back 2 weeks ago. Dealer wont honor correcting the repair.

- South Windsor, CT, USA

When the vehicle is in park, and I attempt to turn vehicle off, I get a messege saying to put vehicle in park. Vehicle will not turn off.

- Pen Argyl, PA, USA

I'm getting the "Shift to Park" message when my vehicle is already in the Park position. This issue first started happening in 2019 and I took it to my local GMC service center to be looked at since it was still under warranty. It started happening again about 2 weeks ago. My extended warranty and powertrain has expired, so I'm concerned that the same dealership will charge me for this repair when I take it this week. If this is a known issue with this vehicle, as evidenced by the scores of complaints related to this issue, why isn't there a recall on this vehicle?

- Jackson, MS, USA

Shift to park warning is coming on, I am not able to turn the car off. The car is rolling either forward or backward while in the parked position. I have to turn the car on and off many times plus put it in forward, reverse, neutral and most of the time that still does not fix the problem. The car will not turn off, and it is rolling forward or backward while it is parked.

- Kansas City, MO, USA