Buick Repair Questions? Ask a Mechanic for Answers ASAP
Did the dealer connect the vehicle to their computer to unlock the radio?
2000 and newer GM car radios can only be unlocked by programming the vehicles VIN into the radio with the dealers scan tool (Tech 2). If the radio will not communicate with the scan tool then either the radio is faulty or you have a wiring problem. If all fuses are good and the dash wiring has never been messed with then the radio has likely just failed. You could have the radio repaired or you can replace it.