The Chevrolet car company built its first truck in 1918, and released its C/K series of trucks in 1962. Two wheel drive trucks had a "C" prefix while the "K" prefix trucks were four wheel drive. The 1992 Chevrolet K1500 was equipped with an electronic fuel pump, located in the gas tank. The fuel pump transfers gas from the fuel tank through the truck's fuel lines and into the engine. Like most car parts, the fuel pump may eventually fail and need to be replaced. You can take certain steps to troubleshoot a fuel pump before you determine that it needs to be removed.
Listen to the fuel pump to see if it energizes before the truck's engine turns on. Insert the truck's ignition key into the ignition and turn it to the right one notch so that the truck's battery is on, but not the engine. With the key in this position the fuel pump should begin sending gas through the fuel lines to the engine. Be sure to conduct this test in a quiet place so that you can hear the pump. If you have a hard time hearing the pump you may need to have a second person stand by the fuel tank and listen for you.
Look for symptoms that the fuel pump has failed. The two major signs that the pump is not functioning properly are the car failing to accelerate when the gas pedal is pressed and the car failing to start.
Test the truck's fuel pressure. Connect a fuel pressure gauge to the schrader valve of the truck. The schrader valve is located in the engine block and looks like an air valve you would find on your truck's tires or the tires of a bicycle. Screw the fuel pressure gauge onto the valve and turn the truck on to see whether the fuel system has sufficient fuel pressure. The 1992 K1500 should have between nine and 13 pounds per square inch.
Check to see if the fuel pressure regulator is functioning properly. If the fuel pressure is low the regulator may be the cause instead of the fuel pump. The regulator is located near the front of the engine block on top where it is easily accessible. With the fuel pressure regulator still connected to the schrader valve, gently squeeze the rubber hose connected to the fuel pressure regulator with some pliers. If the fuel pressure increases when you squeeze the regulator should be replaced, not the fuel pump.
