Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1987HI-CUBE 6.2 J, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISFUEL PUMP - ELECTRICREMOVAL & INSTALLATIONFUEL PUMP
1987 Chevrolet Hi-Cube 6.2 J, 400/M40
Fuel Pump
1987 Chevrolet Hi-Cube 6.2 J, 400/M40SECTION Fuel Pump
- Remove "FUEL PUMP" fuse from fuse block. Crank engine. Engine will start and run until residual fuel in lines is used. After engine stops, crank engine an additional 3 seconds to relieve any remaining pressure. Turn ignition off and install fuel pump fuse.
- Disconnect battery negative cable. Raise and support vehicle. Remove fuel tank. Turn sending unit lock ring counterclockwise. Pull lock ring away from tank. Remove fuel pump/sending unit assembly from tank. Remove pump from sending unit. To install, reverse removal procedure using NEW O-ring seal.. Start engine and check for leaks.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.