1993 chevy Z 71 truck

The in tank fuel pump is bad. When you buy the part, it's actually called a fuel pump module. He'll have to remove the filler tube, remove the straps holding the tank under the truck (use a floor jack and a piece of wood to slowly lower it down), disconnect the electrical connections and drag the tank out from under the truck. Use a hammer and a BRASS punch to remove the lock ring. The reason why you want to use a brass punch, it won't create any sparks. when putting the lock ring back on, be sure to grease the large O-ring so it doesn't kink and this will make it easier to re-install the lock ring. Installation is the reverse of removal.