Whenever the vehicle is on a hill even in the drive mode, the car rolls back. Not only a few inches, but a continued backward motion with no end in sight. At about a half block to a block while rolling back, the vehicle will stall and shut off. I have taken the matter up with Buick and was told that there was no error transmission code for the issue.

I had taken the vehicle twice to Buick and was met with the same result... No error code.

When I brought the vehicle for the second time, I was told that the rollback test was performed at the dealership and the vehicle indeed did rollback. However, I was told that this was "normal" for the vehicle to do this.

I was not happy to hear this and requested to take my complaint to the corporate level. I then contacted corporate Buick and was told the same thing... that it was a normal operation of the transmission. I am afraid that I will be on a hill and have a rear end collision with someone who is close behind me.