How to Replace the Fuel Pump on a 2018 Chevrolet Malibu (In-Tank vs High-Pressure DI)
Step-by-step instructions, required tools/parts, safety tips, and how to identify the correct pump type
How to Replace the Fuel Pump on a 2018 Chevrolet Malibu (In-Tank vs High-Pressure DI)
Step-by-step instructions, required tools/parts, safety tips, and how to identify the correct pump type
🔧 Malibu - Fuel Pump Replacement
Your Malibu can have two different “fuel pumps,” and the replacement procedure is completely different depending on which one you mean: the in-tank (low-pressure) fuel pump module or the engine-mounted high-pressure fuel pump (direct injection).
Tell me which one you’re replacing and I’ll give you the exact step-by-step for your Malibu.
Difficulty Level: Intermediate | Estimated Time: 1.5-5.0 hours
⚠️ Safety & Precautions
- ⛽ Fuel is extremely flammable—no smoking, sparks, or hot work.
- 🧯 Keep a Class B fire extinguisher nearby.
- 🧤 Wear gloves and safety glasses; fuel can irritate skin/eyes.
- 🔌 Disconnect the negative battery cable before opening fuel lines.
- đź’¨ Relieve fuel pressure before disconnecting any fuel line or pump.
- đźš— If lowering the tank: support the vehicle securely on jack stands on level ground.
🔧 Required Tools
You'll need the following tools for this repair:
- Safety glasses
- Nitrile gloves
- Class B fire extinguisher
- Floor jack (rated 3-ton minimum)
- Jack stands (rated 3-ton minimum, pair)
- Wheel chocks
- Socket set (metric 8–18mm)
- Ratchet (3/8" drive)
- Extensions (3/8" drive, 3" and 6")
- Torque wrench (10–150 ft-lbs range)
- Trim/panel removal tool
- Fuel line disconnect tool set (specialty)
- Plastic drain pan (at least 2-gallon)
- Shop towels
- Flashlight
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Fuel pump (confirm type: in-tank module or high-pressure pump) - Qty: 1
- Fuel pump seal/O-ring (for in-tank module) - Qty: 1
- High-pressure fuel pump gasket/seal (if equipped) - Qty: 1
- One-time-use fuel line retainer clips (if equipped) - Qty: 1 set
đź“‹ Before You Begin
- đź“ť Please answer these 2 quick questions so I give you the correct Malibu procedure:
- Are you replacing the in-tank fuel pump module (inside the fuel tank) or the high-pressure fuel pump (mounted on the engine)?
- If you lift the rear seat bottom, do you see a round/oval access cover in the floor (service access), or is there no access cover (tank must be lowered)?
- Park on level ground, set the parking brake, and place wheel chocks.
- Work with the fuel level as low as possible. Less fuel = easier and safer.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Confirm which fuel pump you’re replacing
- Reply with your answers to the two questions in “Before You Begin.”
- Once you confirm, I’ll provide the exact Malibu steps including line routing details and Torque to XX Nm (YY ft-lbs) specs.
Step 2: Do not disconnect fuel lines yet
- Until we confirm the pump type and access method, don’t open any fuel line.
- Keep the battery connected for now; we’ll disconnect it at the right step after pressure relief.
âś… After Repair
- After the correct pump procedure: cycle ignition ON/OFF to prime the system, then check carefully for leaks.
- If the check engine light is on after repair, scan for codes and confirm fuel pressure readings.
đź’° DIY vs Shop Cost
Shop Cost: $600-$1,600 (parts + labor)
DIY Cost: $200-$900 (parts only)
You Save: $400-$700 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-5 hours.
🎯 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.
