🔧 Equinox - Fuel Pump Replacement

Your Equinox actually has two fuel pumps: a fuel pump module in the tank and a high-pressure pump on the engine. The steps, tools, and difficulty are very different.

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

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⚠️ Safety & Precautions

• ⛽ Fuel is highly flammable – keep all sparks, cigarettes, and open flames far away.
• 🧯 Work in a well-ventilated area to avoid breathing fuel vapors; have a fire extinguisher nearby.
• 🔌 Disconnect the negative battery cable before working on the fuel system.
• 🧤 Fuel will irritate skin and eyes – wear safety glasses and fuel-resistant gloves.
• 🛠 Your Equinox’s tank is under the rear floor – the vehicle must be safely raised and supported.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🧰 Floor jack (rated 3-ton minimum)
• 🧰 Jack stands (rated 3-ton minimum, Qty 4)
• 🧰 Wheel chocks
• 🧰 Safety glasses
• 🧰 Nitrile gloves
• 🧰 Drain pan (fuel safe)
• 🧰 Shop rags
• 🧰 3/8" drive ratchet
• 🧰 1/2" drive ratchet
• 🧰 10mm socket
• 🧰 13mm socket
• 🧰 15mm socket
• 🧰 6" socket extension
• 🧰 Torx T15 screwdriver
• 🧰 Flathead screwdriver (medium)
• 🧰 Fuel line quick-disconnect tool set (GM size) (specialty)
• 🧰 Fuel pump lock ring tool (GM plastic ring type) (specialty)
• 🧰 Pry bar (small)
• 🧰 Transmission/floor jack with wide saddle (for fuel tank support)
• 🧰 Torque wrench 3/8" drive (5–60 Nm range)
• 🧰 Torque wrench 1/2" drive (20–150 Nm range)
• 🧰 Plastic trim tool set
• 🧰 Multimeter

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Fuel pump module (in-tank, with fuel level sender) - Qty: 1
• 🔩 Fuel pump module seal/O-ring - Qty: 1
• 🔩 Fuel pump lock ring (tank retaining ring) - Qty: 1
• 🔩 Fuel tank strap bolts (replacement hardware) - Qty: 4
• 🔩 Fuel line retaining clips - Qty: 2–4
• 🔩 Electrical contact cleaner - Qty: 1
• 🔩 Anti-seize compound - Qty: 1
• 🔩 Penetrating oil spray - Qty: 1

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📋 Before You Begin

• 🅿️ Park the Equinox on a flat, solid surface; set the parking brake; place wheel chocks at the front wheels.
• ⛽ Try to have the fuel tank nearly empty; a full tank is very heavy.
• 🔌 Disconnect the negative battery terminal using a 10mm socket.
• ⛽ Relieve fuel pressure:
  • Pull the fuel pump fuse or relay in the underhood fuse box (check the fuse box lid diagram).
  • Start the engine and let it run until it stalls, then crank for 3–5 seconds more.
  • Turn ignition OFF and reinstall the fuse/relay after repair is complete.
• 🧯 Keep a class B/C fire extinguisher within reach.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Safely raise and support the rear of the Equinox

• Use the floor jack to lift the rear of the vehicle at the rear center jacking point (under the rear subframe crossmember).
• Place jack stands under the rear pinch welds on both sides; lower the vehicle onto the stands.
• Leave the floor jack lightly touching the center area under the rear subframe for backup support.
• Never work under a car supported only by a jack.

Step 2: Support the fuel tank

• Position the transmission/floor jack with a wide saddle or a wooden board under the center of the fuel tank.
• Raise the jack just enough to firmly support the tank without lifting the vehicle.

Step 3: Remove the fuel tank shield (if equipped)

• Use a 13mm socket and ratchet to remove any bolts securing the plastic or metal tank shield.
• Lower the shield and set it aside.
• Spray rusty bolts with penetrating oil first.

Step 4: Disconnect fuel filler neck and vent hoses

• At the left rear of the tank, locate the large filler hose and smaller vent hose going to the tank.
• Use a flathead screwdriver to loosen the hose clamps.
• Twist the hoses gently to break them free, then pull them off the tank fittings.
• Use shop rags to catch any small fuel drips.

Step 5: Unplug electrical connectors and fuel lines at the tank

• At the front top area of the tank, locate the main fuel pump electrical connector.
• Use a plastic trim tool to release any clips holding the harness to the tank.
• Press the locking tab and disconnect the electrical connector by hand.
• For fuel lines:
  • Use the fuel line quick-disconnect tool to release the fuel supply line from the tank fitting.
  • Wrap the connection with shop rags to catch fuel as you separate it.

Step 6: Remove fuel tank straps

• Support the tank firmly with the transmission jack; slightly raise if needed.
• Use a 15mm socket and 1/2" drive ratchet to remove the rear strap bolts (one on each strap).
• Slowly lower the straps away from the tank; note their orientation for reinstallation.
• Torque on reassembly: 40 Nm (30 ft-lbs).

Step 7: Lower the tank and access the pump

• Slowly lower the transmission jack to bring the tank down a few inches.
• Check for any remaining hoses or connectors; disconnect them using flathead screwdriver or hands as needed.
• Lower the tank fully and slide it out from under the vehicle.
• Work slowly; don’t force the tank past obstacles.

Step 8: Clean around the pump opening

• Set the tank on a clean surface.
• Use shop rags to wipe all dirt around the fuel pump lock ring and opening.
• Keeping dirt out prevents fuel system damage.

Step 9: Remove the fuel pump lock ring

• Install the fuel pump lock ring tool over the plastic lock ring tabs.
• Use a 3/8" drive ratchet to turn the tool counterclockwise to unlock the ring.
• If you don’t have the tool, a brass punch and hammer are sometimes used, but the proper tool is safer for plastic rings.
• Lift off the lock ring and remove the old tank seal/O-ring.

Step 10: Remove the old fuel pump module

• Carefully lift the pump module straight up from the tank.
• Angle it slightly to clear the float arm and internal hoses.
• Let excess fuel drain from the module into the tank before moving it to the drain pan.

Step 11: Install the new seal and pump module

• Place the new fuel pump module seal/O-ring into its groove on the tank opening.
• Carefully lower the new pump module into the tank, ensuring the float arm is not bent.
• Align the pump module tabs with the alignment marks on the tank (note the orientation of the electrical connector/fuel line fittings to match the old one).

Step 12: Reinstall the lock ring

• Set the new or cleaned lock ring over the pump module.
• Use the fuel pump lock ring tool and 3/8" ratchet to turn it clockwise until it fully locks into its stops.
• Torque: 100–110 Nm (74–81 ft-lbs) if your tool and ring style allow torque measurement.

Step 13: Reinstall the fuel tank

• Slide the tank back under the vehicle and position it on the transmission jack.
• Raise the tank slowly into position, ensuring it clears exhaust and suspension parts.
• Reconnect any upper hoses or electrical connectors you can reach as the tank comes up.

Step 14: Reinstall tank straps and shield

• Position the fuel tank straps over the tank.
• Install new or cleaned strap bolts using a 15mm socket and 1/2" ratchet.
• Torque strap bolts to 40 Nm (30 ft-lbs) with the torque wrench.
• Reinstall the tank shield using the 13mm socket; snug the bolts to about 15 Nm (11 ft-lbs).

Step 15: Reconnect filler neck, vent hoses, fuel line, and wiring

• Reconnect the large filler hose and smaller vent hose to the tank fittings; tighten clamps using a flathead screwdriver.
• Snap the fuel line back onto the tank outlet using your hands; gently tug to ensure it is locked.
• Reconnect the main fuel pump electrical connector by hand until it clicks; secure the wiring with clips using a plastic trim tool.

Step 16: Lower the vehicle

• Remove the transmission jack from under the tank.
• Use the floor jack to lift the rear slightly, remove jack stands, then lower the Equinox to the ground.

Step 17: Reconnect battery and prime the fuel system

• Reconnect the negative battery cable using a 10mm socket; tighten to about 8 Nm (71 in-lbs).
• Turn the ignition key to ON (engine off) for 5 seconds, then OFF; repeat 3–4 times to let the new pump prime the system.

Step 18: Start the engine and check for leaks

• Start the engine and let it idle.
• Visually check underneath for any fuel leaks near the tank, straps, and fuel line connection.
• Sniff for strong fuel smells; if present, shut the engine off and recheck all connections.

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✅ After Repair

• 🚗 Take a short test drive (5–10 minutes) and make sure there is no hesitation, stalling, or loss of power.
• ⛽ Recheck for fuel leaks after the drive, especially under the rear of the vehicle.
• 💡 If the check engine light is on, use a scan tool at a local shop or parts store to clear any old fuel-system codes.
• 📏 Confirm the fuel gauge reads correctly as you refuel; an incorrect reading can indicate an issue with the new module’s level sensor.

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💰 DIY vs Shop Cost

Shop Cost: $750–$1,050 (parts + labor)

DIY Cost: $220–$380 (parts only)

You Save: $530–$670 by doing it yourself!

Shop labor rates vary but typically run $100–$150/hour. This repair takes a shop approximately 3–4 hours.

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🎯 Ready to get started?

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