Radio won't turn on after I start car. However if I turn on radio before starting car and the door is open it will come on. If I leave the radio on and shut car down and leave car, when I return & before start the car, the radio will come on upon start up. Seem like there is a radio control switch in the door area that is tempermental.

- Plano,, TX, USA

Sunroof spontaneously exploded while driving on the highway at approximate speed of 65 mph. Occurred while driving open area and nothing hit the vehicle. Temperature was approximately 41 degrees at about 7:30pm with no rain, snow, etc. At the time of incident. There was a very loud "bang" sound with 5 passengers in vehicle at the time. Inside temperature of vehicle set at 72 degrees. Some very small pieces "sand like" of glass were noticed on center console, front seats. Not sure where else. A new insurance claim has been initiated. The dealership service tech isn't going to contact GM to advise of any possible defect since he believes the sunroof must have been hit by some object on the outside since the hole is in center and he saw no cracks or anything coming from an edge. Additionally, he never heard of any instances like this with Buick/GM even though I believe this could be a first of manufacturing, safety, recall issue.

- Buffalo Grove, IL, USA