How do you change the temperature switch on a 93 Corsica 3.1 so the cooling fan will run?

FIRST CHECK YOUR FAN TO BE SURE IT WORKS, ONE EASY WAY IS TO DISCONNECT THE FAN AT IT'S CONNECTOR AND USE JUMPER WIRES TO CONNECT IT DIRECTLY TO THE BATTERY, ANOTHER FASTER WAY IS TO RUN YOUR AC ON COLD, AFTER A FEW SECONDS THE RADIATOR COOLING FAN SHOULD KICK ON. THERE WAS A VEHICLE RECALL/SAFETY BULLITEN ABOUT THE WIRE HARNESS TO YOUR COOLING FAN SWITCH, THE WIRES ARE/WERE EXPOSED OUT SIDE OF WIRE PROTECTORS SUBJECTING THEM TO CHAFFING AND HOT SURFACES, CHECK TO MAKE SURE YOUR WIRING IS PROTECTED. I SIGNED UP ON ALLDATA.COM FOR MY CORSICA, IT COST $14.95 BUT WELL WORTH THE COST, EVERYTHING YOU CAN IMAGINE IS COVERED IN THERE ONLINE TECH MANUAL