Adding a cheap keyless entry module to a '97 Chevy Cheyenne with factory power locks but without factory keyless entry. 2 doors truck has a Type C or 5 wire reverse polarity door lock system. Crew cab system is a different type. The focus is on adding two relays to replicate what the door switches do when you push the buttons to lock or unlock. The wires must be spliced, not simply tapped into. The relays assembly will be functioning in the area between the door switch and the wire harness on the driver's door. The keyless entry module will be sending a Negative signal to the relays to activate them.