Hy-Ko 18GM504 Key Blank, Brass/Plastic, Nickel, For: GM Vehicle Locks

Contains a computer chip in the head of the key programmed to the vehicle's security system. The ChipKey blank is first electronically programmed with Hy-Ko's C3 I-tool and then cut on a standard key cutting machine. Duplicate keys requires programming the matching code in order to operate the vehicle. Waterproof.