Corvette Chevy Malibu 90-04 Car Radio Wire Harness "sales letter" Questions

need unlock code for radio I purchased at garage sale have code from radio 212220 Post the radio MAKE and model plus all the letters+numbers on any labels, barcodes and engraved in the metal casing

...(licence is to prove YOU own the car) to a car dealer ie: Holden, Ford, Chrysler and ask at the sales office for the RADIO SECURITY PIN NUMBER, You'll receive your Radio security pin number and ...