🔧 Grand Cherokee - Fuel Pump Replacement

On your Grand Cherokee, the fuel pump is part of an in-tank fuel pump module. Replacing it typically requires safely lowering the fuel tank to access the pump opening from the top of the tank.

Difficulty Level: Advanced | Estimated Time: 3-5 hours

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⚠️ Safety & Precautions

• ⚠️ Work outdoors or in a well-ventilated area; fuel vapors ignite easily.
• ⚠️ No smoking, no grinding/sparks, and keep a fire extinguisher nearby.
• ⚠️ Support the tank with a transmission jack before loosening straps.
• ⚠️ Disconnect the negative battery terminal to reduce spark risk.
• ⚠️ Relieve fuel system pressure before disconnecting any fuel line.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Fire extinguisher (Class B)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Transmission jack (specialty)
• Socket set 8mm-18mm
• Ratchet
• Long extensions set
• Torque wrench (10-200 Nm range)
• Trim clip remover
• Flat-blade screwdriver
• Fuel line quick-disconnect tool set (specialty)
• Hose clamp pliers
• Shop towels
• Drain pan
• Brass punch and hammer (specialty)
• Permanent marker

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly - Qty: 1
• Fuel pump module seal/O-ring - Qty: 1
• Fuel tank strap bolts - Qty: 2
• EVAP hose clamps - Qty: 2

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Use wheel chocks on the front wheels.
• Lower the fuel level as much as possible (near empty makes the tank much lighter).
• Disconnect the negative battery cable using a 10mm socket.
• Relieve fuel pressure before opening any fuel line.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel system pressure

• Open the fuel filler door and loosen the gas cap to vent tank pressure.
• In the underhood fuse box (TIPM), remove the fuel pump fuse/relay using a trim clip remover or your fingers.
• Start the engine and let it run until it stalls; crank for 3-5 seconds more to clear remaining pressure.
• Turn the key OFF.

Step 2: Raise and support the vehicle

• Lift the rear of your Grand Cherokee using a floor jack (rated 3-ton minimum).
• Support it securely on jack stands (rated 3-ton minimum) at the rear lift points.
• Keep the floor jack (rated 3-ton minimum) lightly supporting as a backup.

Step 3: Support the fuel tank

• Position a transmission jack (specialty) under the fuel tank.
• Place a flat piece of wood (if available) between jack and tank to spread the load.

Step 4: Remove any shields/skid plates (if equipped)

• Remove fasteners using an 8mm socket or 10mm socket (varies by shield).
• Set shields and bolts aside in order.

Step 5: Disconnect the filler neck and EVAP lines

• At the tank area, loosen hose clamps using a flat-blade screwdriver or hose clamp pliers.
• Disconnect the EVAP/vapor lines by releasing the quick-connect locks using a flat-blade screwdriver.
• Use shop towels to catch any fuel drips.

Step 6: Disconnect electrical connectors at the tank

• Unplug the fuel pump module electrical connector(s) using a flat-blade screwdriver to gently lift the lock tab if needed.
• Don’t pull on wires—pull on connectors.

Step 7: Disconnect fuel supply line(s)

• Place a drain pan under the line connection.
• Use the fuel line quick-disconnect tool set (specialty) to release the fuel line(s).
• Cap/cover open lines with shop towels to keep dirt out.

Step 8: Lower the tank straps and lower the tank slightly

• Remove the tank strap bolts using a 15mm socket (most common size).
• Lower the transmission jack (specialty) slowly a few inches.
• Stop and check for any remaining hoses/wires still attached; disconnect as needed using a flat-blade screwdriver.

Step 9: Lower the tank enough to access the fuel pump module

• Lower the tank until you can reach the top of the tank comfortably.
• Clean the area around the pump module using shop towels so dirt does not fall into the tank.
• Mark the module orientation with a permanent marker.

Step 10: Remove the fuel pump lock ring

• Use a brass punch and hammer (specialty) to tap the lock ring counterclockwise until it releases.
• Lift the lock ring off and set it aside.
• Brass reduces spark risk versus steel.

Step 11: Remove the fuel pump module

• Lift the module straight up carefully; tilt as needed to clear the float arm.
• Remove the old seal/O-ring from the tank opening using a flat-blade screwdriver carefully.

Step 12: Install the new seal and new module

• Install the new seal/O-ring into the tank groove by hand (do not twist it).
• Insert the new module in the same orientation as your mark.
• Reinstall the lock ring and tap clockwise using the brass punch and hammer (specialty) until fully seated.

Step 13: Raise the tank and reconnect lines and wiring

• Raise the tank using the transmission jack (specialty) into position.
• Reconnect fuel line(s) until they click; tug lightly to confirm lock.
• Reconnect EVAP/vapor lines until they click.
• Reconnect electrical connectors.

Step 14: Reinstall tank straps and shields

• Install tank strap bolts using a 15mm socket.
• Torque to 40 Nm (30 ft-lbs) using a torque wrench (10-200 Nm range).
• Reinstall any shields/skid plates using an 8mm socket or 10mm socket.

Step 15: Restore power and prime the fuel system

• Reinstall the fuel pump fuse/relay by hand.
• Reconnect the negative battery cable using a 10mm socket.
• Turn the key to ON (engine off) for 5 seconds, then OFF; repeat 3 times to prime.
• Start the engine and let it idle.

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✅ After Repair

• Check carefully for leaks at the fuel line connections and at the tank top area.
• Confirm the fuel gauge reads reasonably and the engine runs smoothly.
• If you have a scan tool, clear any stored fuel/EVAP codes and recheck after a short drive.
• Take a short test drive, then recheck for leaks again.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,600 (parts + labor)

DIY Cost: $250-$650 (parts only)

You Save: $650-$950 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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🎯 Ready to get started?

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