[BNaylor]

The Grand Prix as well as other cars have a brake transmission shift interlock (BTSI) system. For safety the key can only be removed in PARK. The shifter in the console has a shift interlock and park switch that sends 12 volts to the key release solenoid which is part of the ignition switch assembly. If you ever spilled coffee or soda on the center console the electrical components may get damaged or mechanically stick. I've seen a mix of problems as the cause. Bad shift interlock which will require replacement of the complete shifter assembly, missing 12 volts to the BTSI circuits and fuse, ignition switch and harness assembly or the key release solenoid switch located in the steering column. BTW - The ignition switch and the key release solenoid are different parts although located together in the steering column.