🔧 Fuel Pump - Replacement

Your fuel pump is inside the fuel tank on your Silverado. This job usually means lowering the tank, disconnecting the fuel lines and wiring, then swapping the pump module and seal. It is a messy, fuel-related repair, so take your time and keep sparks and flames away.

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

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⚠️ Safety & Precautions

• Work outside or in a very well-ventilated area.
• No smoking, open flames, heaters, or spark-producing tools near the truck.
• Relieve fuel pressure before disconnecting any fuel lines.
• Support the fuel tank before removing straps.
• Fuel is flammable and can irritate skin and eyes; wear gloves and safety glasses.
• Battery disconnect is required before opening the fuel system.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated for truck weight)
• Fuel line disconnect tool set
• Ratchet
• Metric socket set
• Extensions
• Torque wrench
• Flat-blade trim tool
• Drain pan
• Shop towels
• Brass punch
• Dead blow mallet

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module - Qty: 1
• Fuel pump tank seal - Qty: 1
• Fuel pump lock ring - Qty: 1
• Fuel filter sock - Qty: 1
• Fuel line O-rings - Qty: 1 set

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Keep the fuel level as low as possible before starting. A nearly empty tank is much easier to lower.
• Disconnect the negative battery cable before touching the fuel system.
• Let the engine cool completely first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel system pressure

• Use the fuel pump fuse or relay removal method, then start the engine and let it stall.
• Turn the key off and disconnect the negative battery cable with a ratchet and metric socket.
• Crank briefly to remove remaining pressure.

Step 2: Raise and support the truck

• Use a floor jack and jack stands to lift and support the truck safely.
• Make sure the truck is stable before going underneath.

Step 3: Support and lower the fuel tank

• Place the floor jack under the fuel tank with a wood block if needed.
• Use the metric socket set and ratchet to remove the fuel tank strap bolts.
• Lower the tank just enough to reach the top connections.
• Do not let the tank hang by the hoses.

Step 4: Disconnect the fuel lines and wiring

• Use the fuel line disconnect tool set to release the fuel supply and return lines, if equipped.
• Disconnect the electrical connector at the pump module.
• Move the lines and harness aside carefully.

Step 5: Remove the fuel pump module

• Clean the area around the pump cover to keep dirt out of the tank.
• Use a brass punch and dead blow mallet to tap the lock ring counterclockwise and remove it.
• Lift the fuel pump module straight out of the tank.
• Remove the old tank seal and discard it.

Step 6: Install the new pump module

• Install the new fuel pump tank seal on the tank opening.
• Lower the new pump module into the tank carefully without bending the float arm.
• Install the lock ring and tap it clockwise with the brass punch and dead blow mallet.
• Torque to 54 Nm (40 ft-lbs) if a torque specification is provided with your service hardware; otherwise seat the ring fully and evenly.

Step 7: Reconnect tank, lines, and wiring

• Reconnect the electrical connector.
• Use the fuel line disconnect tool set to reconnect all fuel lines until they click in place.
• Raise the tank with the floor jack and reinstall the tank straps using the metric socket set.
• Torque to 25 Nm (18 ft-lbs) for typical strap fasteners unless your service fastener callout differs.

Step 8: Reassemble and restore power

• Lower the truck off the jack stands.
• Reconnect the negative battery cable with a ratchet and metric socket.
• Install the fuel pump fuse or relay back in place.

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✅ After Repair

• Cycle the key to ON for 5 seconds, then OFF. Do this 3-4 times to prime the system.
• Check carefully for fuel leaks at the tank, lines, and filter connections.
• Start the engine and let it idle while you inspect again for leaks.
• If the engine runs rough at first, let it stabilize before driving.
• Clear any stored fuel system codes if a check engine light stays on.

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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 4-6 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.