While stationary, instruments show a shift to park message, even though the car was in park. Acadia would not fully turn off until this message is not present. The only way found to have the message clear is to continually shift from drive to park until it recognizes that the car is indeed in park. This happens repeatedly - 8 out of 10 times I drive my car.

- Magazine, AR, USA

Cannot leave car. "shift to park" message appears even with car is parked. Sometimes takes 15 minutes to put car in park

- Frederick, MD, USA

When I try to shut off ignition I get a warning on the dash that says to put vehicle into park before shutting the vehicle off even though the vehicle is in park already. I have to shift in and out of park or ride around again and then trying parking again to get it to shut off. Once I even left it running and went into the store because I could not get the vehicle to shut off due to it thinking it was not in park and it was.

- The Villages, FL, USA

After parking, my Acadia would not shut off completely. A message came on the dash, 'action required, shift to park'. a constant chime was sounding also. I restarted the car, shifted out of park, back into park, tried to shut off again...same thing....4X's!!! I went right over to the dealer where I bought my car and explained what was happening ( couldn't shut off there either). Service manager knew immediately what the problem was but says the part (gear shift) is on backorder and has no idea for how long!!! what"?? why isn't this a recall" I've read quite a few of this same complaint so I can't understand how this isn't a recall already especially if the gear shift required to fix the problem is on backorder, it's obviously a bigger issue then 1 or 2. so for now, I just have to wait and 'keep playing with the gear shifter until it goes off' as I was told until the part comes in! how crazy is this

- Rockaway, NJ, USA

1* purchased March 2018 (Acadia denali) since August 2018 in motion when I accelerate it sounds like a loud lawnmower & crackling sound in rear muffler area. Took it Chevy place in glenpool, ok. They couldn't find anything. 2* on 2 occassions, in motion, the car accelerated with a loud noise & as if it were getting power & not moving then jerks & speeds up about 15mph faster & I couldn't stop it. I kept slamming on my breaks, but the break would only go in so far. I was frightened with my 2 young boys in car screaming. It's like riding a horse & it takes off & you can't control it. 3* on about 8 or 9 occassions stationary I get out of my car & it makes a really loud annoying sound like a machine/robot powering down. My kids always say, it's going to blow up 4* the most annoying, for past month...stationary, every single day & time I turn my ignition off. It has loud beeping sound & check rear seat flashing on screen then shift into park flashes. This occurs every single time I turn my car off. Sometimes I have to just let it go on all day because I can't get it stop. I turn car on & off shift back & forth & it still will not go off. Sometimes it does after long periods of time. I don't have time to struggle with getting a car into park every single time I turn my ignition off. I have to beat it forward hard with my hand to the point my wrist is bruised. Now I have to use my foot to kick gear shifter into park. I'm afraid T's going to roll out & or down and hit something, someone or even one of my children. Which would not be good. I've seen several of same complaints. This really needs to be investigated & recalled asap. My elderly mother had to call my brother to another part of town to beat the gear shift into park. This car was brand new & I shouldn't have any of the above mentioned issues. It's frustrating thinking GMC was top of the line & it's not.

- Okmulgee, OK, USA

When I go to put car in park and go to turn it off it saw shift to park on the information screen. The shifter is in park and P flashes on and off on the shifter. GMC has said they do not have a fix for this. This is a safety issue if you think you're in park and go to get out and it is not.

- St. Louis, MO, USA

I financed this vehicle in May 2018 through a GMC dealership. It is January 2019 I started getting alerts once I put my car in park and turned the motor off. The warning alerts stated on the dashboard "action required -shift to park-" even though it is is park. The alert is loud and will not go off. I have to start the car again and adjust the gear shift a few times by moving it to drive, neutral or reverse before the vehicle recognizes that it is is park and the alert leaves the screen and the sound goes off. Sometimes it takes a few moments of moving the gear shift before I am able to leave the vehicle. This is highly inconvenient especially when you are in a hurry to leave the vehicle. I am extremely frustrated because this is a brand new vehicle. I contacted the dealer and they immediately asked me was the car still under 36,000 miles. Thankfully it is. I entered my VIN number in this database and no recalls have came up for my model oddly. But for a different model of the gma Acadia 2018 there is 2 recalls. Ironically, the same complaint has been reported.

- Muskogee, OK, USA

When I put the in park, it does not recognize that the vehicle is already engaged. The console displays tells me to put vehicle in park and beeps. I have to keep moving the gear shift from reverse to neutral to park several times before it recognizes the vehicle in engaged in park. This has been happening about 8 months or so. I have mentioned it to the dealer and they tell me their are no recalls for my problem, not even recognizing my problem with the vehicle.

- Redlands, CA, USA

When you put the shifter in park it does not recognize & cabin alarm starts to beep. The vehicle will also leave its headlights on overnight & drain your battery. Took to dealer and they couldn't do anything about it. It's been 2 weeks and no letter of resolution from manufacturer as the dealer said.

- Cody, WY, USA