2016 GMC Acadia

Technician told me the engine "grenaded itself". "Cylinder #4 melted into the side walls of the cylinder wall caused by air to fuel mix ratio controlled by the ECU failure to mix appropriately." My family and I were traveling for Easter and were stranded on the side of the highway. I had a private repair shop (Greenville Auto Clinic LLC) confirm as well as the local dealership Greenville Chevy. The vehicle required an engine replacement. I did contact GMC's Zone Manager out of Atlanta, GA for assistance, he reduced the bill from over $10,000 down to $6098. There was no error messaging, only an engine that would not respond to the accelerator pedal. The engine would try to accelerate, but struggled to the point it would die when I applied too much pressure on the gas pedal.

On about 01/20/2025 my transmission? Auto started to shudder before going into 3rd gear threw 5th. Once in 6th gear at about 55 the auto starts to shudder and turns into a rumble feeling. My auto only has 100650 for miles on it. It has been serviced and have brought it to GM 01/24/25 to ask about it? After talking to service adviser. It would cost me 75.00 for someone to go with me to confirm it is doing it. Then make an appointment for further evaluation. No price given at this time. but did not on paper! Say That it is most likely torque converter causing the problem? Confirmed It is not under warranty and there was nothing GM could do.i have been to at least 3 other shops in my area and they all say the same thing and price. Which is between 6 to 7 thousand dollars to replace the transmission. They all dosay that when it goes it could make me loose control Due to lockup.

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 [XXX] ). 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. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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

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!

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.

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.