Cruise Control problems of the 2017 GMC Acadia

My 2017 had a shift to park issue. When parked and the car is in "park" the car will say "shift to park" which causes you not to be able to lock the car, or to make sure the car will not roll away. Took the car to the dealer and had all components replaced, however they information me that this will not fix the problem as the parts are made incorrectly, so unfortunately it will happen again at some point. My second issue with the Acadia is when you are in cruse control, the car will automatically apply the breaks (abruptly and hard) for no reason. GMC says that it could be when the sensors get dirty or overheat, however it makes you very uneasy knowing your breaks can mash on at anytime by themselves when you are using the cruise control system.

While in motion on a city or freeway approximately 35-70 mph, my GMC Acadia will randomly disable the steering assist, lane keep assist, and forward collision automatic braking as well as disable the cruise control feature. The error would show that these features were disabled on the display screen around the speedometer and could not manually be re-enabled with the buttons throughout the car. However, when pulling over and turning off the vehicle and restarting it, the feature would reset as if nothing has went wrong. Sometimes it will revert back to the same issue(s) 5-10 minutes later, and sometimes not at all for a few days or even weeks before starting back over again with the same problems.

The adaptive cruise control (acc) in my 2017 Acadia denali will shut off and even cause the vehicle to break for no reason. This has happened numerous times, even with no other vehicle on the road or obstacles in the road. When it happens the acc will shut off, you will hear two distinct chimes and you will see a message saying, �adaptive cruise control disengaged�. After this happens you will not be able to reengage the acc and if you try the vehicle will display a message that says �temporarily unavailable. � I have had it to the dealership numerous times and they have stated they don't know why it would happen, and cannot do anything unless they can duplicate it. It happens a lot but the dealership and GMC say there is no problem. The first time this happened it almost caused my wife to wreck, since the acc shut off and applied brakes with no other car on the road, badly startling her, and she thought she had hit something. I even have a video of the acc showing �temporarily unavailable� after one occasion it shut off and slowed the vehicle. In this instance there were no car in front of me or on either side, but there was one behind me who I am sure was not happy when the vehicle in front of him braked for no reason. A GMC representative told me I can have all the video I want, but it �doesn't matter and won't change anything�. The dealership did do a complete diagnostic on one occasion and found evidence that the acc had shut off, but the code did not say why it shut off. This has happened at different speeds range from 55 to 75 mph. We have had it happen three times in a 30 minute period and drove for a month without it happening. This causes an unsafe driving experience and should be fixed or the vehicle replaced. I have found other people online who have experienced this, but there are not enough of us to warrant GMC doing anything.