There are several componets of the fuel pump. There is the pump and an expensive sender unit. All of this is inside the gas tank. Mine broke in NJ while traveling and it cost me $816 to have all the fuel pump stuff replaced at a Chevy dealer. I think I posted all the exact parts on another post. VBD To find the fuel pump relay on a 1991 Caprice first open the hood and it will be located on the right (passenger side) inner fender near the hood hinge. Standing in front of the vehicle with the hood raised, there are (2) relays on the inner fender wall, just beside the MAP sensor. With the ignition in the ON position, remove one of the plugs from one of the relays, if the ABS light comes on in the vehicle, this is the ABS relay and the OTHER relay is the fuel pump relay
I just changed the fuel pump relay on my 1992 Chevy Caprice. I found it on the driver's side fender well bracket. There were two relays mounted on the bracket, the one closest to the engine was the fuel pump relay. It was square, made by Bosch. Also I found out that you can go to your local Chevy service department. They will show you on a computer screen where to find parts like this.
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