On the 04 and newer models the radio is programmed to work only in the car it was installed in from the factory. You can swap radios from car to car, but you have to go to a dealer and have the new radio reprogrammed to work in your car, cost is about $75-$100 for this service. That is why it is better to go with an aftermarket radio, then it is plug and play, with the proper harness that is, GMOS-01 for non Monsoon car and GMOS-04 for a Monsoon car. Before I forget, only 04-08 radios will work in 04-08 cars
