general problems of the 2017 GMC Acadia

I’m just reporting several known issues. First, with code p2138, which I got today at oreilly after my car started throwing warnings. I used my parking brake briefly and afterwards got the following warnings on my car: “steering assist is reduced, drive with care”, “engine power reduced” , “propulsion power is reduced” , “service parking brake”. I’ve never even had one of these warnings. I’ve only gotten “shift to park” which is another known & common issue. With this p2138 code, it can affect acceleration and essentially loss of control over it, but seems I suddenly have several issues. Recently the infotainment system is possessed, touch screen stops working, it calls people by itself, beeps and scrolls by itself and is essentially useless. Might as well be driving at 1997 something or other, at least I could play a tape or cd. This is denali trim at 87k miles. Primarily though I’m concerned with this code, if it’s legit, it is very dangerous. How unreliable and unsafe to not know.

Tl-the contact owns a 2017 GMC arcadia. The contact stated while stopped with the vehicle in park. The shift to park message was displayed and an abnormal chime was detected. Additionally, the doors failed to lock. The contact called shelton Buick GMC, inc. 855 s rochester rd, rochester hills, mi 48307(248) 266-2156 where informed the repaired were not covered under warranty. The vehicle was not diagnosed ore repaired. The manufacturer was not contacted. The failure mileage was 25,000. Ap.

I brought it in to service department a couple months ago because the accelerator would accelerate with out me pushing the gas even slamming on the brakes would get to 85 90 miles an hour. Finally got it off the road and off huge quantities of white smoke from the brakes being so hot. Assured me it was fixed and last night in highway traffic did it again. Almost got me killed. Service said there was no recall but this is very dangerous!.

This issue has happened 3 times now and is becoming a safety concern for my family and I and for others on the road. I purchased the car brand new in may 2017 and the issue occured for the first time on October 02, 2017. Second time was February 15, 2018 and the third time happened around early April 2018. While driving at a slow speed (entering a parking lot, in the middle of an intersection when I was about to make a left turn on a green light, and while driving in a parking lot after getting gas) the car made a grinding/clunking sound and was brought to a very abrupt stop. I tried to press the gas but the car would not move. I changed the gear from drive to park and then drive again and would still not move. I turned the car off and then back on and still nothing. I ended up figuring it out by pressing the parking break button 1-2 times and was then able to proceed to drive. It seems as though something may have triggered the parking brake but while I was in drive and while the vehicle was moving. I was almost rear ended when this happened in the intersection and also during the time I was unable to move in the intersection, my light had changed to yellow and then red and oncoming traffic was honking because they could not go on their green light due to me being stopped in the intersection. It was very scary and dangerous as it almost caused an accident 2 out of the 3 times it has happened. I told service dept at the dealership about it twice. They have "looked into it" one time but since they were not able to replicate the issue (obviously), there is nothing they can do. I am concerned about my families safety if this continues to happen.

Adaptive-cruise-control (acc)/forward collision braking(avoidance) system applied very strong brakes(twice) in certain scenario when using acc, increasing the chances of vehicle behind rear-ending. While acc is enabled, say your vehicle comes to fullstop as vehicle in front has come to a full stop(say at traffic signal) and acc applies full brakes. Traffic ahead starts moving again, but since vehicle won't move on its own driver is required to press accelerator to get it moving again or acc to resume its operation (this is by design). In such scenario if driver ends up pushing accelerator a bit harder(I. E. More than just tapping it), acc applies very strong brakes stopping vehicle right there. By this time vehicle behind you has started moving already and might rear-end due to abrupt stop. I guess acc thinks distance between you and vehicle ahead is very less and thinks its going to collide and hence applies strong brakes. But this is a bad design/programming since it expects driver to push acc. Pedal for acc to resume operations, but if driver does it bit more than what acc likes, there is a chance of accident. Gm should perform more tests with its acc around such scenarios and fine-tune their acc software.