1999 Chevrolet pick up what would cause the
fuel pump to have no power?
First thing to check would be the fuel pump relay. Less than a $10 part.
I looked at info for 99 Silverado 1500--5.3 L engine. If you have different model or engine size, let us know. Note the diagram. Make sure battery has a full charge and connections all good. I need to ask, engine cranking, do you have spark at the plugs and fuel injector pulse? Key on engine off, can you hear the pump run for a few seconds? Any applicable trouble codes?
Fuel pump fuse, relay, wiring problems. Remember the fuel pump will only get power for a few seconds if the engine has not started and is running.