Power liftgate malfunction- liftgate was operated from the rear switch. Upon activation it rose almost fully and then slammed down on a person while they were accessing the rear cargo area, injuring their nose and face. Liftgate failed to stop at obstruction. From that point on liftgate failed to open or close without manual intervention. Vehicle was stationary, engine running and mostly level street. Weather had been rainy but was not raining at the time, 63 degree temp. Not sure if it was in park or drive, but brakes were applied and other passengers were entering the vehicle. The next morning the power liftgate has operated normally.

- St. Peters, MO, USA

Stationary, new vehicle possibly inappropriately equipped. A vehicle with a 2nd row bench seat providing seating for 3 with a center occupant seat belt but without head restraint (and no provision for head restraint). I cannot seem to determine if such a configuration does or does not comply with federal regulations. I cannot determine, therefore, whether I am or am not legally allowed to carry a passenger in the middle (inboard) seat.

- Reno, NV, USA

When the SUV goes from 6 cylinders to 4 it makes a vibrating noise like a helicopter over head they say this is normal but it is extremely irritating I found out that other people have complained but it appears nothing is being done this noise has to be fixed

- West Seneca, NY, USA

The horn is extremely hard to push. Most people have to use the palms of both hands and arch their back against the seat. I took the vehicle in for service to a GMC dealer and they were also shocked at how difficult it was to push the horn. After further investigation, GMC said the horn "works as currently designed". they also indicated they tried 3 other 2017 Acadia's in inventory and they were all very hard to push. To me, the phrase "works as currently designed" is indicative of a problem. I am unable to warn pedestrians or motorists of an impending danger. I have to work too hard and long to push the horn. A horn should be able to be pushed very quickly in order to warn or alert of a danger.

- St. Peters, MO, USA

On a recent trip. Going 70 mph on the highway, 28 degrees outside. We constantly had to keep turning down the inside temp. Started at 72 degrees inside and finally got to a comfortable inside temp at 66 or 67 degrees. Anything above that was way to hot. When you stopped or slowed way down, the temp had to be turned up. This is while the system was set to auto. This could cause the driver to take there eyes off of the road to mess with the climate control.

- Uniontown, PA, USA

2017 Acadia 'denali' trim is missing afm information from its dic display. Afm information shows when the engine is using 6 V/S 4 cylinders. Other trims seem to show afm information when equipped with V6 engine. Afm is an important feature and denali being the highest level trim should definitely have this information available. GM should provide upgraded display to 2017 denali customers.

- Santa Clara, CA, USA

The horn takes a lot of force to honk or engage the horn. I took it to the dealer and the technician said, "it was by design". to me this is a flow and it is a safety concern to me and my family.

- East Elmhurst, NY, USA