🔧 Acadia - Fuel Pump Replacement

On your Acadia, the fuel pump is part of an in-tank fuel pump module. Replacing it usually requires lowering the fuel tank, then swapping the module and seal to fix no-start, low fuel pressure, or pump noise issues.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

Quick questions (so I give the exact correct path): (1) Are you replacing the entire fuel pump module (recommended) or just the pump motor? (2) Do you have an access panel under the rear seat/cargo floor, or is the tank fully covered underneath?

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⚠️ Safety & Precautions

• 🔥 Fuel vapors ignite easily—work outdoors or in strong ventilation, no smoking, no heat guns, no drop lights.
• 🧯 Keep a Class B fire extinguisher nearby.
• 🔋 Disconnect the negative battery cable before opening any fuel lines.
• ⛽ Relieve fuel pressure before disconnecting lines to prevent a high-pressure spray.
• 🧰 Support the tank securely—fuel slosh makes it unstable, especially if it’s more than 1/4 full.

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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 3-ton minimum)
• Wheel chocks
• Transmission jack (specialty)
• Metric socket set (8mm-21mm)
• 3/8" drive ratchet
• 1/2" drive breaker bar
• Torque wrench (20-200 ft-lbs)
• Flat trim tool
• Fuel line disconnect tool set (3/8" and 1/2")
• Brass punch
• Small hammer
• Fuel pump lock ring remover J-45722 or equivalent (specialty)
• Scan tool with GM fuel pressure data (specialty)
• Fuel-safe drain pan
• Shop towels
• Paint 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 tank seal (O-ring/gasket) - Qty: 1
• Fuel pump module lock ring - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the front wheels.
• Run the fuel level down to about 1/8 tank if possible to make the tank lighter.
• Plan for two people if the tank is heavy.
• Have a clean area ready—dirt in the tank can damage the new module.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel system pressure

• Remove the fuel filler cap to release tank vapor pressure.
• Use a scan tool with GM fuel pressure data (specialty) to confirm pressure drops after shutdown (if available).
• If you don’t have a scan tool: pull the fuel pump power (fuse/relay per underhood fuse box label), then crank the engine for 5-10 seconds with a 3/8" drive ratchet ready for later steps. The goal is to use up pressure before opening lines.
• Tip: Keep towels around any fuel fitting.

Step 2: Disconnect the battery

• Use the appropriate metric socket to disconnect the negative battery cable and isolate it so it can’t spring back.

Step 3: Raise and support the Acadia

• Use a floor jack (rated 3-ton minimum) to lift the rear.
• Set the vehicle onto jack stands (rated 3-ton minimum) at proper lift points.
• Keep the transmission jack (specialty) ready for the fuel tank.

Step 4: Remove components that block the fuel tank (as equipped)

• Inspect underneath for shields/braces around the tank.
• Use a metric socket set (8mm-21mm) and 3/8" drive ratchet to remove any underbody shields that prevent tank access.
• Mark locations with a paint marker so everything goes back exactly.

Step 5: Support the fuel tank

• Position the transmission jack (specialty) under the center of the tank with a stable pad.

Step 6: Disconnect EVAP and fuel lines at the tank

• Use safety glasses and place a fuel-safe drain pan underneath.
• Disconnect quick-connect lines using the fuel line disconnect tool set (3/8" and 1/2").
• Use shop towels to catch drips and keep dirt out of the lines.
• If a connector is stubborn, use a flat trim tool gently—do not pry hard on plastic nipples.

Step 7: Disconnect the fuel pump electrical connector

• Unplug the harness at the tank/module using a flat trim tool to help release the lock tab if needed.

Step 8: Lower the tank

• Remove the tank strap fasteners using a metric socket set (8mm-21mm) and 1/2" drive breaker bar as needed.
• Slowly lower the tank with the transmission jack (specialty), watching for any lines you missed.
• Tip: Lower a few inches, re-check, then continue.

Step 9: Clean the module area

• With the tank down enough to access the top, wipe and clean around the pump module so debris can’t fall into the tank.
• Use shop towels only—avoid compressed air that can blow dirt into the opening.

Step 10: Remove the fuel pump lock ring

• Mark the lock ring and module position with a paint marker.
• Use fuel pump lock ring remover J-45722 or equivalent (specialty) to turn the ring off.
• If you must tap it: use a brass punch and small hammer. A brass punch is softer than steel to reduce spark risk.

Step 11: Remove and replace the module

• Lift the module out slowly and angle it as needed to clear the float arm (fuel level arm).
• Remove the old seal and install the new fuel pump module tank seal (O-ring/gasket).
• Install the new fuel pump module assembly in the same orientation as your alignment marks.

Step 12: Reinstall lock ring, raise tank, and reconnect everything

• Install the new fuel pump module lock ring and tighten using fuel pump lock ring remover J-45722 or equivalent (specialty) until fully seated/locked at the stops.
• Raise the tank with the transmission jack (specialty).
• Reconnect the electrical connector and all fuel/EVAP lines until you hear/feel a positive “click.”
• Reinstall shields using the metric socket set (8mm-21mm) and tighten with a torque wrench (20-200 ft-lbs) to factory specification.

Step 13: Lower the vehicle

• Lower from the jack stands using the floor jack (rated 3-ton minimum).
• If wheels were removed, tighten lug nuts with a torque wrench (20-200 ft-lbs): Torque to 190 Nm (140 ft-lbs).

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✅ After Repair

• Reconnect the battery using the correct metric socket.
• Prime the system: turn ignition ON for 5 seconds, OFF for 5 seconds, repeat 3-4 times before cranking.
• Start the engine and check carefully for leaks at every quick-connect fitting.
• If you have a scan tool with GM fuel pressure data (specialty), verify pressure is stable and check for codes.
• Clear any stored codes and road-test, then re-check for seepage.

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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?

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.