[richtazz]

The relay's are a little box that looks like a big fuse, only they have 4 or 5 prongs. It's a simple job to swap them out. You unplug the old one, pull it from it's mount and replace it with a new one. The relays should be under a plastic cover just above the heater blower motor on the firewall in the engine compartment. They are about 1" square and should have the number 12193601 on them. By the diagram in the GM computer, it appears they will be mounted in the 3rd and 4th positions from the drivers side.