The check engine light has come on multiple times in the past 6 months. I have taken it 3 times to be repaired and finally the found out what was wrong. The first time that I brought it in, May 2023, the Bank 1 Lean Code was coming up on the diagnostic. They replaced a sensor for $300. 2 weeks later the check engine light came on again. They got the same codes and didn't know what exactly was causing it so they fixed a bunch of things which cost me $2,200. 3 months later, the check engine light came back on again. This time they're telling me the repairs cost $3,725 and it's related to this bulletin (https://static.nhtsa.gov/odi/tsbs/2019/MC-10160115-9999.pdf). This seems like a safety hazard that I should not have to pay for. My car only has 58,000 miles. I already paid $2,500 in misdiagnosed problems and now they want me to pay another $3,725. I don't have my bills to upload because they're in my glove box and my car is with the dealership.

- North Kingstown, Ri, RI, USA

While driving vehicle slowed down then stopped & would not restart for a while. After 15 mins was able to start but now try to drive & vehicle is vibrating tries to move forward then vibrates again stalls the engine dies then starts rolling backwards. The vehicle will restart but try driving the traction control comes on drives for about a foot then cuts off & rolls backward

- Powder Springs, GA, USA

While driving my 2016 GMC Acadia Denali home from work I noticed my speed getting faster so I let off my gas pedal. My engine then abruptly revved to the highest rpm and accelerated ON ITS OWN. My speed increased to almost 100 mph and I am going up a steep incline. I did not have my foot on the pedal and this car accelerated on its own and was only going faster and faster. I tried to brake but it would not slow my car down. I am in rush hour traffic and I feel like this is where I am going to die today. I continued to slam on my brakes to a point that I felt the brakes grinding but ultimately was able to slow the car down enough to get to the side of the road. However, I am unable to fully stop my car. After I was able to slow it down to a slow crawl (even with the engine rpms revving extremely high still), I was fumbling for my phone to call my husband and inadvertently took my foot off the brake and the engine jerked me again and caused my car to take off again with such force my whole body hit my seat back. I then slammed the brakes again and pushed the gear into park with such force to automatically stop the car, which was hard to do because the car was still moving. Once the car was in park, the engine continued to rev at the highest speed and I then turned my car off. I was such an emotional wreck after this I got out of my car and refused to get back in it to this day. This vehicle is possessed. I looked up this same issue with other GMC Acadias and found it has happened to others yet AGAIN GMC does not recall these vehicles. This is the second serious issue I have had with this vehicle and I want GMC to take my car back and I will NEVER own another GMC!

- Evanston, WY, USA

This is a complaint update#498946. I made all the necessary repairs outlined and detailed on the diagnostic report issued by the dealership. I picked my vehicle up on Thursday evening. I got up at 6:00 on Friday March 18th and noticed my OnStar diagnostic report had come through at 12:00 am and stated there was a problem with my emissions/transmission. I immediately at 8:30 called GMC manufacturing and they told me to take the vehicle back and GMC manufacturing made me a 1:00 appointment for the same say while I was on the phone. I had to be at work at 12 noon so my husband took it there and came back and told me that my transmission was bad. The dealership offered to but my vehicle back fir $18,500 or pay for the repairs myself $3.909. I asked for assistance since this was the initial problem I took it in for and it has network weeks and I haven-€™t heard anything. This month is my 2 year anniversary of owning it. I informed the dealership about the Special Warranty coverage and they stated that this was not covered but I explained to them that the coverage is limited to 150,000 miles and that my vehicle only has 120,000 miles on it so I am confused and seeking clarification and explanation from a higher source and no one has contacted in 2 weeks.

- Frankfort , KY, USA

Low oil pressure warning, engine shutoff. Vehicle was equipped with oil life monitoring. It was at 20%, when engine shutting down. Engine seized, called tow truck. Towed to shop. The only report was to the dealership and the repair shop. Possible high oil consumption. The warning was last minute, barely had time to react.

- Saint Paul, MN, USA

Air conditioning hose rubbed/melted from being too close to the engine frame. Had it replaced in 2019 by dealership. Now it is happening again in 2021 and dealership says the bracket for the engine needs tightened so it doesn't keep occurring. It will cost over $2000 to get this fixed again. Air blows hot air in rear and passenger side ac vents and driver side is getting warmer as well. Air doesn't not blow cold when stationary or while driving.

- Peoria, AZ, USA

Ac makes noise under hood and does not get cold. Mechanic said ac very low and rear evaporator is leaking. Vehicle only has 31300 miles. Checked online and others have had the same issue with the Acadia.

- Virginia Beach, VA, USA

A/C compressor locked up and has burnt the belt to all pulleys. Was being driven down highway which caused power steering to stop making extremely difficult to steer almost in a crash.

- Galena, OH, USA

The contact owns a 2016 GMC Acadia. The contact stated that while stopped at a traffic light, the vehicle began to vibrate abnormally. The contact stated that the check engine warning light flashed on and off and the service stabila-trac warning light illuminated. The contact also stated that the traction control warning light illuminated. The vehicle was taken to faulkner Buick GMC trevose located at 4427 E street rd, trevose, pa 19053, phone number: (267) 984-4658, to be diagnosed. The contact was informed that there was an O2 sensor failure, along with an ECM malfunction, and fuel level sensor needed to be replaced. The vehicle was repaired however, the failure recurred several times. The manufacturer was not contacted and made aware of the failure. The approximate failure mileage was 26,334.

- Philadelphia, PA, USA

On multiple occasions the vehicle has completely shut-down, while sitting stationary in traffic with the brakes applied (once at stoplight, another time backing out from driveway with brake applied prior to transitioning to drive) each occasion the vehicle was restarted with no issue or warning lights. 1st time taken to dealer, no "codes" were found and were unable to re-create problem, and sent home. Currently at dealer for the 2nd time and still unable to retrieve error codes or re-create. Currently contacting GM for assistance. Vehicle purchased new in December 2016 from North star GMC in Pennsylvania, and currently has less than 10K miles.

- Cranberry Twp, PA, USA