[RacinRex]

If you have never replaced the pump, you can almost bet that it has failed. I have a 96 Tahoe and it went out once. Then I thought it did again. It didn't help that the parts store was just selling me the pump itself when they were supposed to be selling the casing and all. Also, on the wires to the pump, the ground corroded and was causing a problem. Just some things to look for.