95 Blazer 4door i want to intall a lock/unlock switch in the back like in tahoes. how do i add a lock/unlock to the system?

 

ive also thought about this mod, I would start with pulling a lock/unlock switch and bezel from a tahoe/suburban with the same interior color as yours, just to get it match anf look stock. then get a wiring diagram for your blazer and tap into your existing wiring and run the wires to the back and then install the switch. this would be a very cool How-to!