2018 Buick Enclave Transmission and drivetrain Problems

“Shortly after getting gas, the car will rev to 2-3rpm when lightly accelerating, and seem to run rough . Then, after coming to a stop at a traffic light, the car will auto stop and then shift into neutral. I can not shift back into drive without pushing the start/stop button to restart the car. It does not happen every time I get gas, but all 3 times it has happened have been after getting gas. The first 2 times it happened, I was told there was a recall, which was the cause, but this last time, there was no recall, and they said there were no error codes, so they do not know what is wrong. …”

“Second time in less than a month on a 2018 Buick Enclave that air conditioning unit/evaporator in vehicle is not working and vehicle is blowing hot air only. This occurs whether vehicle is in motion or stationary. This happens when vehicle is first powered on or over an extended drive (45 mins). Does not oscillate with change in speed. Does not oscillate with length of drive. Hot air blows the entire time and noise comes from dash that sounds like hydraulic door hinge.”

“My car starting sputtering on take off from stops, extremely dangerous if you’re trying to get out in traffic and keep up quickly from a stop. Then when I took it to get looked at it the mechanic said it needs a new transmission. Now my family is stuck because that’s our only vehicle big enough for our growing family. They’re was a check engine light that keeps coming on.”

“I am the original owner of this Buick Enclave Avenir. I have had two near accident occurences when the car started foring the breaks while I was accellarating on the highway and was not behind another vehicle. The car behind me nearly rerended me. On 10/17/26, my purge valve was replaced for the third time, making this the fourth purge valve the car has had. After getting gas, the car will not start, which is an indicator the part has gone bad and needs to be replaced. In June of 2025 I took my car to Anderson Buick over concerns while accellerating. …”

“I purchased a new 2018 Enclave in september of 2018. I received a recall letter for the vehicle sometime during the spring 2019 so I went to my dealer service department to get it check and I was told everything was fine. Then in september I noticed the check engine light came on and the vehicle would not accelerate properly so I took it to the dealer service dept. Asap. They told me there was an issue with the transmission. They said that because I had less than 5,000 miles this issue should not be occurring. …”