🔧 Fuel Pump - Replacement

The fuel pump on your Silverado is inside the fuel tank, so the job requires lowering the tank to access it. This is a safety-sensitive repair because fuel vapors are flammable and the system is under pressure.

Difficulty Level: Advanced | Estimated Time: 4-6 hours

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⚠️ Safety & Precautions

• Work outdoors or in a very well-ventilated area. Keep all sparks, flames, and hot tools away.
• Disconnect the negative battery cable before starting. This helps prevent accidental fuel pump operation and electrical sparks.
• Relieve fuel system pressure before opening any fuel lines.
• Use a fuel-safe drain container if the tank needs to be lowered with fuel still inside.
• The fuel tank is heavy. A nearly full tank can cause injury if it shifts or drops.
• Do not smoke anywhere near the repair area.

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🔧 Required Tools

You'll need the following tools for this repair:

• Ratchet
• 8mm socket
• 10mm socket
• 13mm socket
• 15mm socket
• Fuel line disconnect tool set
• Torque wrench
• Floor jack (rated 3-ton minimum)
• Jack stands (rated for vehicle weight)
• Fuel transfer pump
• Drain pan
• Trim tool
• Safety glasses
• Nitrile gloves
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module - Qty: 1
• Fuel tank seal / O-ring - Qty: 1
• Fuel filter screen - Qty: 1
• Fuel tank strap bolts - Qty: 2
• Fuel line quick-connect seals - Qty: 1 set
• Fuel - Qty: enough to refill tank as needed

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📋 Before You Begin

• Park on a level surface and set the parking brake.
• Run the tank down to as little fuel as possible before starting. Less fuel makes the tank safer and easier to lower.
• Disconnect the negative battery cable first.
• Relieve fuel pressure at the Schrader valve on the fuel rail if equipped, or follow the pressure relief method from the service procedure.
• Label every connector and line before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect battery and relieve pressure

• Use a 10mm socket to disconnect the negative battery cable.
• Relieve fuel pressure at the fuel rail carefully with a pressure relief method and absorb any small fuel spill with shop towels.
• Let the truck sit for a few minutes before continuing.

Step 2: Raise and support the truck

• Use a floor jack to raise the truck safely.
• Support it with jack stands placed at approved lift points.
• Make sure the truck is stable before working underneath it.

Step 3: Remove the fuel tank shield and support hardware

• Use the 13mm socket and 15mm socket to remove any fuel tank shield or skid plate hardware, if equipped.
• Set all fasteners aside in order so they go back in the same locations.

Step 4: Disconnect fuel tank electrical and fuel lines

• Use the fuel line disconnect tool set to release the fuel supply and return lines, if equipped.
• Disconnect the electrical connector for the fuel pump module and the EVAP connections.
• Press tabs gently, don’t force connectors.

Step 5: Remove the fuel tank straps

• Support the fuel tank with the floor jack and a broad wood block or jack pad.
• Use the 15mm socket to remove the fuel tank strap bolts.
• Lower the tank a few inches at a time and recheck that every line and connector is free.

Step 6: Lower the tank and remove the pump module

• Lower the tank far enough to reach the top of the fuel pump module.
• Clean the area around the module with shop towels before opening the tank.
• Use the correct specialty lock ring tool or an approved method for the retaining ring to remove the fuel pump module.
• Lift the old module out carefully and remove the old seal.

Step 7: Install the new fuel pump module

• Install the new fuel tank seal / O-ring in the tank opening.
• Lower the new pump module straight down into place.
• Install the retaining ring and secure it fully.
• Torque to factory specification for the retaining ring if provided by the service data.

Step 8: Reinstall the tank

• Raise the tank with the floor jack while checking that hoses and wiring are not pinched.
• Reconnect the fuel lines and electrical connectors.
• Reinstall the tank straps using the 15mm socket.
• Torque tank strap bolts to factory specification.

Step 9: Reassemble and reconnect battery

• Reinstall any shields or skid plates with the 13mm socket or 15mm socket.
• Reconnect the negative battery cable with the 10mm socket.

Step 10: Prime and test the system

• Cycle the key to ON for a few seconds, then OFF, several times to prime the fuel system.
• Check carefully for fuel leaks around the tank, lines, and module.
• Start the engine and let it idle while you inspect again for leaks and abnormal noises.

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✅ After Repair

• Verify the engine starts normally and idles smoothly.
• Inspect for fuel smell or wet spots under the truck after the first drive.
• If a check engine light remains on, scan for fuel system codes and clear them after the repair is confirmed.
• Recheck all fasteners after a short test drive.

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💰 DIY vs Shop Cost

Shop Cost: $900-$1,700 (parts + labor)

DIY Cost: $250-$700 (parts only)

You Save: $650-$1,000 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 4-6 hours.

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🎯 Ready to get started?

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