My vehicle would not unlock for hours then it finally did and ran for a bit. Then when started again would not N. then went to bri G it in and nothing worked correct. The speedometer was at 0 and it was scary! the whole vehicle would not work right and when I brought it in they said it was a side sensor module and it was $735 to replace. My car is not that old. They said wetness could have got to it. We live in min edits. Many cars get wet. That is absolutely crazy. They also told me they share sopose to be coming out with a recall and new boxes that cover these sensors. I will be expecting to be reimbursed when this becomes a recall which it defiantly needs to be! I paid a lot of money for this vehicle. The price of mine should be on this!

- North Branch, MN, USA

Vehicle had multiple (more than 2) warning lights flashing on and off, while RPM and mph needle would fluctuate simultaneously. This would happen while in the driveway and also while in motion. Vehicle would not accelerate with accelerator pedal fully pressed, especially on an incline. While this was occurring I had to exit the highway and turn around in an adjacent subdivision. I could not get out of the way of a car in the neighborhood because I was trying to go forward on the street due to a slight incline. It would also jerk into gear when moving from reverse and drive. Had this happened in a traffic intersection, it would have been deadly. This car is unsafe. After 6 months of being 'fixed' it has started happening again. The dealership has had the vehicle for a week this time without being able to fix it. The last time it was at the dealership for around 10 days.

- Clayton, NC, USA

When car is put into park a 'action required' comes up saying 'shift into gesr' which the vehicle is already in park. Therefore, will not shut off causing the battery to drain and die.

- Allenstown, NH, USA

Shift to park error message when gear shift is in park and vehicle is turned off. The auxiliary power stays on (radio and usb) and will not let me lock the doors. This happens nearly every day. Must restart the vehicle and put into gear then into park multiple times.

- West Bloomfield, MI, USA

The A/C comes on and off automatically and you have no control over it. GM states they did this so you don't have to turn your def. On. while I'm driving I continually have to take my eyes off the road to fiddle with the temp. Control. (the A/C comes on full cold) I've contacted GMC and they refuse to do or offer any help in this matter.

- Indianapolis, IN, USA

When you put the shifter into the park position and you try to turn off the vehicle with the start/stop button an on dash error code of 'shift to park' appears even though the vehicle is clearly in park. You are not able to turn the vehicle off. It beeps incessantly, the battery remains on and the doors do not want to lock. GMC has been made aware of the issue by hundreds of 2017 Acadia owners however their engineers have not found a solution. This defect is forcing me to turn the engine on and off multiple times, trying putting the car in reverse and then shifting back in drive, wiggling the shifter, opening the rear passenger doors and repeating any and all of these processes until it eventually turns off the shift to park message and allows the vehicle to shut down (or if you can confuse the electrical panel and have another message pop up to override it, such as the one that says 'check rear passenger seat". I do not know if my car is ever truly in gear or not. I'm afraid that it might cause a dangerous situation where my vehicle rolls thinking it is not in park or the battery dies unexpectedly or the vehicle is stolen because it will not shut off or the doors will not lock. I bought this vehicle brand new and this started occurring at around 15,000 miles and is a highly reported problem that necessitates a recall fix for safety.

- Severn, MD, USA

I purchased a new 2017 GMC Acadia on December 14th 2017. On October 11th 2018, my Acadia was rendered completely disabled by a what has been described by the dealership as a " dead battery" I was almost locked in the vehicle because the entire electrical system failed and the electronic locks would not operate. There was no previous indication, notification or warning by the vehicle and monitoring service or of an impending battery failure obviously, a 10 month old battery in a new car should not be completely drained after only 10 months of ownership ( leading me to believe there may be more at play than just a bad battery). Had this happened anywhere else besides my driveway, it would have been a major issue. The vehicle was then towed to the nearest authorized GMC repair facility. The dealership ran diagnostic tests of the electrical system and found nothing wrong, but this still leaves me with doubts about the reliability of the vehicle and integrity of the electrical system.

- Pahrump, NV, USA

Shift to park stays on when placing my vehicle into park. This does not allow the electronics to shut off indefinitely resulting in a dead battery. GMC has stated that this is not a recall and that because I am out of my warranty this is not covered. After reading multiple forums there are hundred of people with this same issue from 100miles to 60K+ and GM has refused to make this a recall. Someone did state that they got their shift assembly replaced and it fixed the problem. Very disappointed with GM and not standing behind an issue that is clearly a defect from the manufacture. They also are having the same issues with Cadillac stemming form their Tennessee plant. Buyers beware!

- Zumbrota, MN, USA

When the vehicle is parked after driving and the placed in park, the vehicle fails to recognize that is in "park". this causes the interior accessories to remain running as though the vehicle is running even when the engine is off. This happens when the vehicle is stationary. From review of information, this is a know manufacturing defect from GM. When GM was contacted to have repaired in the vehicle we were informed that they cannot warranty their vehicles forever and it would not be repaired. This seems to be an inappropriate response for an issue that is not a warranty item but has been published as a manufacturing defect.

- Zumbrota, MN, USA

The contact owns a 2017 GMC Acadia. The contact stated that the vehicle was shifted into the off position with the engine depowered however, the electrical functions continue to function. The brake assist and steering assist warning indicators illuminated. Discovery Chevrolet Buick GMC (2705 us-421, boone, nc) where the failure could not be diagnosed. The failure was not repaired however, the GMC manufacturer informed the technicians to tighten the tensioner cable to temporarily repair the vehicle. The manufacturer was notified of the failure. The failure mileage was approximately 16,000.kh

- Beech Mountian, NC, USA

2017 GMC Acadia denali. Consumer writes in regards to mechanical issues. The consumer stated the vehicle was running very loud and rough upon initial start up. The check engine and service electric parking brake light illuminated. Service parking brake appeared on the dic, a message stating AWD off appeared in the dic. And a notification for an issue with the emissions system also appeared.

- North Scituate, RI, USA

After releasing electronic parking brake, the service parking brake light comes on and the parking brake light flashes. Parking brake is no longer operational.

- Great Falls, MT, USA

The contact owns a 2017 GMC Acadia. While operating the vehicle, smoke and sparks suddenly appeared from the vents inside the vehicle. The driver stopped the vehicle and called the fire department. When the fire department arrived, flames were present under the hood on the driver's side. The flames were extinguished and the cause of the fire was investigated. It was determined that the electronic module casing had blown off and the module had caught fire due to an electrical short. A police report was filed. The manufacturer was notified of the failure. The dealer was not notified. The failure mileage was unknown.

- Mont Claire, NJ, USA

Truck constantly fails to start. Keyfob not recognized. Computer system crashes, rear air vents fall out. Faulty gas tank and gas line. Cannot fill up gas tank past 1/2 a tank. Been happening since inception and is constantly in and out of service for the same issues over the past year. Not being able to start the truck is a safety hazard to me and my family. There needs to be an alternate way to start the truck should the computer system crash.

- Centereach, NY, USA

Hello, is anyone investigating the horn problem with the 2017 GMC Acadia that is well-documented in many places, including your own NHTSA website" the same problem likely exists with the 2018 models as well. This has been an issue since the '17 models were first introduced in 2016 and GM says they can't fix it. A safety issue and they can't fix it" this vehicle needs to be recalled before someone gets hurt, or worse. GM dealers are still selling these vehicles to uninformed buyers and they will not fix the problem.

- Lewes, DE, USA

Horn button is very difficult to activate. Takes 2 hands to depres...safety concern.

- Shelby Twp., MI, USA

Two month old 2017 GMC Acadia denali fwd. Horn is nearly impossible to operate under any conditions. It takes two hands to make it work and only with excessive force, and in only one spot on the steering wheel. Recently I was alongside of a big rig and the driver did not see me. He started to maneuver into my lane and the Acadia horn would not work. Nearly caused a major accident on a 70mph posted highway. The dealer knows about the problem and it has been reported to GMC and NHTSA by many 2017 GMC Acadia owners. To date, GMC offers no fix for this problem. A recall or at least a repair bulletin needs to be issued before someone gets hurt, or worse. This is a widespread safety issue with the 2017 GMC Acadia, and possibly the 2018 GMC Acadia if the same horn activation hardware is used in the newer model.

- Lewes, DE, USA

Stopped at an intersection for a red light, upon green light, accelerator tapped to enter intersection and forward collision braking system applied brakes. Nothing was in front of vehicle at time of forward collision braking system application. Tapped accelerator again and vehicle hesitated but slowly accelerated to normal speeds. The vehicle behind at the time barely stopped which would have rear-ended my vehicle and caused a chain reaction. Continued on to work, carefully applying accelerator after each stop. Very scary for the vehicle to stop in the middle of a busy intersection with traffic behind and not immediately allowing driver to control acceleration.

- Spokane Valley, WA, USA

Horn is so hard to push no one in my family can sound horn guys at dealer could not get it to sound without excessive force this is highly dangerous no one at the dealer or GMC will fix it they say it was the way it was designed again very dangerous some one needs to fix this flaw before someone dies in an accident because they were unable to sound horn to avoid collision I would have never imaged buying a brand new car I would have unresolved safety concerns with the answer from GMC and the dealer being we aren't fixing it so I guess you shouldn't drive it that's the fix not to drive my one and only brand new car how about GMC or the dealer making my brand new car safe and fixing their problem!!!!! there needs to be a recall for this horn

- Orient, OH, USA

It is very difficult to sound the horn. It takes multiple presses and often won't sound without use of both hands. This is a safety hazard. It is an ongoing hazard.

- Bomoseen, VT, USA