Does this have a shifter on the floor?.....could be a problem with the harness to the BTSI solenoid.....not sure on Bravada's, but cars have a lock solenoid in the steering colum....if there is a harness problem, that lock solenoid does not get energized, when you put the vehicle in park, and you can't remove the key.....usually, under the column, in the area of the key, there is a plastic cover that can be removed(or just an opening), and you stick a small screwdriver upward onto a plunger....with the plunger depressed, then the key rotates all the way to be removed(should state this in the owner's manual, if you have it)....