We owned one and the engine would reduce speed and even shut down while driving causing us to loose power of the vehicle. Thankfully we were on a residential street or the outcome could have been worse- the dealership did a fix that didn’t work- they tried something else but we didn’t trust the vehicle anymore and GM and the dealership didn’t want to do anything else to address the problems so we got rid of it ASAP.
This has been an excellent vehicle in nearly every respect. Comfortable and quiet, very good acceleration and handling for a car of this size. Can’t say I loved the infotainment system...like nearly everyone else, GMC overcomplicates this and makes it less useful in the process.
Bought my 2016 Acadia SLE-1 AWD July 2017 with 20,000 miles. First month of driving, noticed in the morning, when I pulled out, very sluggish. As the engine warmed up, once the temperature needle was halfway, then it would drive like a dream. Took it to service, said it was normal. Now it is winter, if I don't let it warmup for 10 minutes or until the needle reaches halfway, the engine revs and the rpm goes over 2 when only going 20 miles. Very disappointing, doesn't seem normal to me. Otherwise I like the style, the space, the comfort. Do not like the fuel economy though.
I bought the car on a promise that they would fix the vibration problem, which seemed to be related to tires. The car gives you a chair massage as you drive, like a tire is out of balance. Car also pulled to the right. First trip, replaced one tire and aligned wheels. "car fixed"!!! Drove home still vibration problem but not as bad, car still pulled to right. Second Trip, re-balanced tires, second alignment. "car fixed". Drove home, pull is gone, car handles great. Still have vibration, although better than before. Am doing some trouble shooting myself before returning for third trip to dealer. Hopefully, I'll get to driver it to somewhere besides the dealership 50 miles away.
Once you get behind the wheel of the GMC Acadia, you'll never want another vehicle every again. The ride is very smooth, quiet interior and a great sound system. The sun roof and moon roof are a great addition to the Denali and the kids love looking out at the stars. One concern is the oil changes seem quite frequent - other than that, and all around great vehicle for the price.