2018 GMC ACADIA Complaints

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

The toe links on my vehicle are bad and needs to be replaced. They broke as I was driving. Almost caused me to lose control and almost wreck. Thankfully there were no other cars around. I see this is a recall for GMC’s but for some reason not my vin number. Not understanding why if I have the same problem on vehicles that were recalled.

Erroneous error code on heads up that car not in park. Appears to be in park, error code can be reset by activation/deactivation of trigger switch on shift lever. Provides unclear message if car is or is not in park, vagueness makes me question vehicle park status overall. Issue was very intermittent in 2022, frequency of erroneous error code increasing now happens 1 out of 5 times when shifting to park.

2018 Acadia will display “Shift to park” warning along with an audible warning when the vehicle is shut off. This happens even though the PRNDL display is in the “Park” position each time. If I try to exit the vehicle, the audible warning continues (apparently indefinitely). This began at an odometer of about 59,200. Initially, the situation could be corrected by restarting the car and shifting in and out of Park or depressing the shift knob several times. Within a couple of hundred miles, it became consistent and eventually could not be corrected as described above. Unfortunately, this is not covered under warranty. I began driving for a few months without the shift knob, simply depressing the plunger on the shift rod coming up from the transmission. Doing this, the warning rarely occurs and, if it does, it’s easily corrected with one or two presses of the plunger. Some modifications of the shift knob have allowed the knob to be used with results similar to driving without the knob. I hope there will be a software update (deployed over OnStar) to use the PRNDL information and eliminate this failed system.

For months after putting car in park it displays a "Shift to Park" message. It won't let you fully shut down vehicle. Some times I can start it again, back up a little, put it back in park for it to shut off. Not one time though. You have to do it repeatedly. Maybe 6 or 7 times before it works. Most times I just finally have to walk away from the vehicle. Problem being it won't let me lock my car - which the police in our area keep warning us to do to prevent the vehicle thefts. It also continues to 'bing', running down the battery, which could leave me stranded somewhere. I looked this up on line assuming it would be a recall because it is a 'known defect' and there are thousands of complaints on line of people having the same issues and dealer won't take care of. There are lawsuits. This should be a recall.

The contact owns a 2018 GMC Acadia. The contact stated that intermittently when the gear was shifted into park(P) and the vehicle was turned off, the "shift into park(P)" message was displayed. The contact stated that she was unable to lock the vehicle and that the interior lights remained on. The vehicle was not yet taken to an independent mechanic or local dealer for diagnosis or repairs. The contact was made aware of NHTSA Campaign Number: 17V516000 (Power Train); however, the VIN was not included in the recall. The manufacturer was not made aware of the failure. The approximate failure mileage was 46,000.

Shift to park issue. Vehicle appears to be in park but message appears. You have to continuously wiggle shifter and shut car off and off until it registers it is in park. I have no way of knowing if vehicle is truly in park or not. For safety reasons I cannot park in an incline due to concerns the vehicle will roll backwards. Several TBS bulletins have been issued by GMC on this known issue and they deny any responsibility of fixing the situation with a recall. The NHTSA needs to step in and investigate and require GMC to remedy this dangerous defect

CAR DOES NOT GO INTO PARK AND WILL NOT SHUT OFF. says shift to park when this happens the car does not shut off correctly and must be restarted and jiggle shifter to turn off. this seems to be a well known problem and is on many years of Acadia

When I put the car in park, I get the message "Shift to Park". It does not do it every time but it is happening more and more. I have to wiggle the gearshift or restart the car and shift to neutral to try it again. I am wondering about the safety issue and will the vehicle roll if I am not able to get the message to go away? I have researched this and it is happening on a lot of vehicles.

The contact owns a 2018 GMC Acadia. The contact stated that on three separate occasions while driving at undisclosed speeds, the gears inadvertently shifted from second gear to third gear and then to neutral. No warning lights were illuminated. The vehicle was taken to the dealer on three separate occasions where the failure could not be duplicated. The vehicle was then taken back a fourth time where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 87,000.