i have a 2000 cavalier that had a stock cassette play that didnt work i bought a cd player out of a 2000 cavalier(it says rds in the front) from the junk yard today it works with key turned back but when you start the car it locks how do i unlock it
You have to take it to someone with a Tech 2 diagnostic tool to re-flash the BCM to unlock it. Any GM dealer.