I have a 1997 pontiac Gd Am. At times went I park car and try to turn off the key it will not turn completely off an key won't come out of ignition. The cars engine shut off but the light radio etc. stays on, as it is like you have it turned to the assessory position, This runs down the battery. Have had in shop and they think they fixed it but so far they haven't found perments solution. Pleas help.