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.
Main Fuel Pump Module
Whenever the fuel pump module is serviced, the rubber O-ring seal must be replaced.
- Position a new rubber O-ring seal onto the fuel tank flange.CAUTION:
Do not allow the float arm of the main fuel pump module to come in contact with any part of the fuel tank during removal or installation, damage to the float arm and fuel level sending card may result.
- Using caution not to bend the float arm (2), lower the main fuel pump module (3) into the fuel tank enough to gain access to the auxiliary fuel pump module supply line connection (1) and connect the supply line.CAUTION:
An indexing arrow is located on top of the main fuel pump module to clock it's position into the fuel tank. The fuel pump module must be installed in the same position as removed.
- Rotate the main fuel pump module until the embossed alignment arrow points to the center alignment mark or the same position as noted during removal. This step must be performed to prevent the float from contacting the side of the fuel tank.
- Position the lock ring (2) over top of the main fuel pump module.
- Install the SAE Fuel Pump Lock Ring Wrench (special tool #9340, SAE Fuel Pump Lock Ring Wrench) (1) into the notches on the outside edge of lock ring (2).
- Install a 1/2 inch drive breaker bar (3) onto the SAE Fuel Pump Lock Ring Wrench (special tool #9340, SAE Fuel Pump Lock Ring Wrench) (1).
- Rotate the breaker bar clockwise until all seven notches have engaged.
- Install the fuel tank. Refer to TANK, FUEL, INSTALLATION .
- If removed, connect the fuel line quick-connect fitting at the fuel rail.
- Connect the negative battery cable (2).
- Start the engine and check for leaks at all fuel system connections.
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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.