🔧 Grand Cherokee - Fuel Pump Module Replacement

Replacing the fuel pump on your Grand Cherokee means removing the fuel tank and replacing the in-tank fuel pump module. The pump module sends fuel from the tank to the engine, and a weak or failed pump can cause long cranking, stalling, no-start, or low fuel pressure.

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

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⚠️ Safety & Precautions

• 🔥 Gasoline is extremely flammable. Work outside or in a very well-ventilated area away from sparks, cigarettes, heaters, and open flames.
• 👓 Wear safety glasses and fuel-resistant gloves. Fuel may spill when lines are disconnected.
• 🔋 Disconnect the negative battery cable before opening the fuel system.
• ⛽ Relieve fuel system pressure before disconnecting any fuel line.
• 🧯 Keep a Class B fire extinguisher nearby.
• 🚗 Support your Grand Cherokee securely with jack stands. Never rely on a jack alone.
• 📉 The fuel tank is heavy. Run the tank as low as possible before starting, ideally below 1/4 tank.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 13mm socket
• 15mm socket
• Ratchet
• 6-inch extension
• Flathead screwdriver
• Fuel line disconnect tool set (specialty)
• Fuel pump lock ring tool (specialty)
• Torque wrench inch-pound
• Torque wrench foot-pound
• Floor jack rated 3-ton minimum
• Jack stands rated 3-ton minimum
• Transmission jack or wide wood board
• Wheel chocks
• Drain pan
• Shop towels
• Fuel-resistant gloves
• Safety glasses
• Class B fire extinguisher

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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 tank seal - Qty: 1
• Fuel pump lock ring - Qty: 1
• Fuel line retaining clips - Qty: As needed
• Evaporative emissions hose clips - Qty: As needed

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📋 Before You Begin

• Park your Grand Cherokee on level ground and set the parking brake.
• Run the fuel level down as low as safely possible before starting.
• Place wheel chocks at the front wheels.
• Open the fuel filler cap to release tank vapor pressure.
• A fuel line disconnect tool releases the spring clip inside quick-connect fuel fittings without breaking them.
• A fuel pump lock ring tool turns the large metal retaining ring that holds the pump module to the fuel tank.
• Take photos of hose and connector locations before disconnecting them. This helps during reassembly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve Fuel Pressure

• Use your hand to remove the fuel filler cap.
• Open the hood and locate the fuse/relay box.
• Use the fuse box cover diagram to identify the fuel pump fuse or relay.
• Use needle-style fingers or a fuse puller if equipped to remove the fuel pump fuse or relay.
• Start the engine and let it run until it stalls. This uses up pressure in the fuel line.
• Crank the engine for 3-5 seconds more.
• Turn the ignition off.
• Less pressure means less fuel spray.

Step 2: Disconnect the Battery

• Use a 10mm socket and ratchet to loosen the negative battery cable clamp.
• Remove the negative cable from the battery post and move it aside so it cannot spring back.
• Torque on reassembly: 5 Nm (44 in-lbs)

Step 3: Raise and Support the Vehicle

• Use a floor jack rated 3-ton minimum to lift the rear of your Grand Cherokee at the rear lift point.
• Place jack stands rated 3-ton minimum under the proper rear support points.
• Lower the vehicle gently onto the jack stands.
• Shake the vehicle lightly by hand to confirm it is stable.
• Never work under a jack-only vehicle.

Step 4: Remove Fuel Tank Shield or Skid Plate

• Use a 13mm socket, ratchet, and 6-inch extension to remove the fuel tank shield or skid plate fasteners if equipped.
• Support the shield by hand while removing the last fastener.
• Set the shield aside.
• Torque on reassembly: 28 Nm (21 ft-lbs)

Step 5: Support the Fuel Tank

• Position a transmission jack or floor jack with a wide wood board under the fuel tank.
• Raise the jack just enough to support the tank. Do not crush the tank.
• A transmission jack is a wide, stable lifting jack designed to hold large parts like tanks and transmissions.

Step 6: Disconnect Filler Neck and Vent Hoses

• Use a flathead screwdriver to loosen the filler neck hose clamp.
• Slide the filler hose off the tank neck by hand.
• Use a flathead screwdriver to release vent hose clips if fitted.
• Mark hose positions with tape if needed.
• Torque hose clamps on reassembly: 4 Nm (35 in-lbs)

Step 7: Disconnect Electrical Connectors and EVAP Lines

• Use your fingers to press the release tabs on the fuel pump electrical connector and fuel tank pressure sensor connector.
• Use a flathead screwdriver gently if a connector lock needs to be lifted.
• Use the fuel line disconnect tool set to release EVAP quick-connect lines.
• Do not pull on wires. Pull only on the connector body.
• EVAP means evaporative emissions. These hoses route fuel vapors to the emissions system.

Step 8: Disconnect the Fuel Supply Line

• Place a drain pan and shop towels under the fuel line connection.
• Use the correct-size fuel line disconnect tool from the fuel line disconnect tool set.
• Push the tool into the quick-connect fitting, then pull the line straight off.
• Cap or cover the open line with a clean shop towel.
• Expect a small fuel spill.

Step 9: Lower the Fuel Tank

• Use a 15mm socket, ratchet, and 6-inch extension to remove the fuel tank strap bolts.
• Keep one hand on the tank or have a helper steady it.
• Slowly lower the jack a few inches.
• Check for any still-connected hoses or wiring before lowering fully.
• Lower the tank enough to access the top of the fuel pump module.
• Torque on reassembly: 47 Nm (35 ft-lbs)

Step 10: Clean Around the Fuel Pump Module

• Use shop towels to clean dirt from the top of the fuel tank around the pump module.
• Do not let dirt fall into the tank.
• Cleanliness protects the new pump.

Step 11: Remove the Fuel Pump Lock Ring

• Use the fuel pump lock ring tool and ratchet to turn the lock ring counterclockwise.
• Remove the lock ring from the tank.
• Lift the fuel pump module straight up slowly.
• Tilt the module carefully to drain fuel from the reservoir into the tank.
• Remove and discard the old tank seal.

Step 12: Install the New Fuel Pump Module

• Install the new fuel pump module tank seal into the tank opening by hand.
• Lower the new fuel pump module into the tank carefully.
• Align the pump module marks with the tank marks.
• Install the new lock ring by hand first.
• Use the fuel pump lock ring tool and torque wrench foot-pound to tighten the lock ring.
• Torque to 75 Nm (55 ft-lbs)

Step 13: Raise and Secure the Fuel Tank

• Use the transmission jack or floor jack with wide wood board to lift the fuel tank into position.
• Make sure no hoses or wires are trapped above the tank.
• Use a 15mm socket and ratchet to install the fuel tank strap bolts.
• Use a torque wrench foot-pound with 15mm socket to tighten the strap bolts.
• Torque to 47 Nm (35 ft-lbs)

Step 14: Reconnect Fuel Lines, EVAP Lines, and Connectors

• Push the fuel supply line onto the pump fitting by hand until it clicks.
• Pull back lightly by hand to confirm it is locked.
• Reconnect EVAP lines by hand until each fitting clicks.
• Reconnect electrical connectors by hand until the locks click.
• Use a flathead screwdriver only if a connector safety lock must be slid closed.

Step 15: Reconnect Filler Neck and Vent Hoses

• Slide the filler hose fully onto the tank neck by hand.
• Use a flathead screwdriver to tighten the hose clamp.
• Reconnect vent hoses by hand and make sure clips are fully seated.
• Use a torque wrench inch-pound if the clamp uses a screw clamp.
• Torque to 4 Nm (35 in-lbs)

Step 16: Reinstall Fuel Tank Shield or Skid Plate

• Lift the shield into place by hand.
• Use a 13mm socket, ratchet, and 6-inch extension to install the fasteners.
• Use a torque wrench foot-pound with 13mm socket to tighten the fasteners.
• Torque to 28 Nm (21 ft-lbs)

Step 17: Lower the Vehicle

• Use the floor jack rated 3-ton minimum to lift the rear slightly off the jack stands.
• Remove the jack stands.
• Lower your Grand Cherokee slowly to the ground.

Step 18: Reconnect Battery and Prime the Fuel System

• Use a 10mm socket and ratchet to reconnect the negative battery cable.
• Use a torque wrench inch-pound with 10mm socket to tighten the battery terminal.
• Torque to 5 Nm (44 in-lbs)
• Reinstall the fuel pump fuse or relay by hand.
• Turn the ignition to ON for 5 seconds without starting.
• Turn the ignition OFF for 10 seconds.
• Repeat this ON/OFF cycle 3 times to prime the fuel system.

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✅ After Repair

• Start the engine and let it idle.
• Check under your Grand Cherokee for fuel leaks near the tank, fuel line connection, and filler hose.
• If the engine cranks longer than normal, turn the key off and repeat the prime cycle.
• Confirm the fuel gauge reads normally.
• Road test for 10-15 minutes, then recheck for leaks.
• If the check engine light is on, scan for codes and clear them after confirming the repair is leak-free.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,050 USD equivalent (parts + labor)

DIY Cost: $180-$450 USD equivalent (parts only)

You Save: $470-$600 USD equivalent by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2.5-4.0 hours.

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🎯 Ready to get started?

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