On inclined or hilly terrain the car rolls back even if in drive. After a complete stop due to traffic or stop sign or signals, when foot is taken off the brake pedal, the car begins to be rollback instantly. Such sudden shift of gear is scary. Reminds you of all the accidents caused by automatic shift of gear. It is a major safety issue. Never had experienced such roll back in the GM cars we previously owned. And they were less expensive cars. The car was bought in novi michgan and was taken to Virginia. It was driven around Washington DC metro area for almost one year. The issue was reported to a dealer in Virginia and Michigan. Not much attention or importance was given. In novi, when asked for documentation of our report, was told it is placed in the system the gps system in the car at occasions have given wrong directions, which it attempted to correct at the last moment requiring immediate and quick maneuvers. That itself causes grave safety problems in multi lane roadways. The gps system I'm the I phone is actually better and more uptodate. The spoken instructions are not as clear as other systems. The dealer said they were not equipped or trained to correct this problem

- Novi, MI, USA