1500 - Fuel Pump Replacement ⛽

On your 2015 1500, the main fuel pump is inside the fuel tank as part of the fuel pump module (pump + level sensor + filter). The tank must be lowered to replace it.

Quick questions before we start:

• ✅ Do you have a safe way to lift and support the truck (good jack + jack stands or a lift)?
• ✅ Is your fuel tank close to empty (¼ tank or less)? A full tank is very heavy and unsafe to drop.

If the answer to either is “no”, I strongly recommend having a shop do this job. If you’re set, follow the guide below.

1500 - Parts & Specs 📦

• 🧰 Main parts
  • Fuel pump module assembly (for 3.6L, 4WD, flex fuel)
  • Fuel pump module seal/O-ring (always replace)
  • Fuel tank strap bolts (replace if badly rusted)
• 🧰 Key torque specs (Ram OEM)
  • Fuel tank strap bolts: 40 N·m (30 ft‑lb)
  • Fuel filler neck clamp: 3–5 N·m (27–44 in‑lb)
  • Fuel pump lock ring: tighten until tabs fully seated; no specific torque, use lock-ring tool and align marks.

1500 - Tools Needed 🔧

• 🧰 Basic tools
  • Floor jack and jack stands (stands hold the truck safely after lifting)
  • Transmission jack or a wide wood-topped floor jack to support the tank
  • Socket set: 8mm, 10mm, 13mm, 15mm, 18mm sockets (metric) + ratchet
  • Extensions and a universal joint (for hard-to-reach bolts)
  • Flat screwdriver and trim tool (for clips)
  • Pliers (regular and needle-nose)
• 🧰 Specialty / very helpful tools
  • Fuel line quick-disconnect tool (small plastic tool that releases the fuel line clips)
  • Fuel pump lock-ring tool or brass punch + hammer (never use steel punch near fuel fumes)
  • Safety glasses and fuel-resistant gloves
  • Drain pan and rags (for spilled fuel)

1500 - Safety First ⚠️

• ⚠️ Work outside or in a very well-ventilated area. No smoking, no open flames, no grinding/welding nearby.
• ⚠️ Disconnect the negative battery cable before touching fuel lines.
• ⚠️ Support the truck with jack stands, never only a jack.
• ⚠️ Fuel is toxic and flammable. Keep a fire extinguisher rated for fuel nearby.

1500 - Prep: Relieve Fuel Pressure & Access 🔍

• 🧰 1. Relieve fuel pressure
  • Remove the fuel pump relay from the under-hood fuse/relay box (check lid diagram for “FUEL PUMP” or “F70/F73” depending on label).
  • Start the engine and let it run until it stalls. Crank for a few more seconds to bleed pressure.
  • Turn key OFF and reconnect nothing yet.
• 🧰 2. Disconnect battery
  • Use 10mm wrench to remove the negative (black) battery cable and secure it away from the terminal.
• 🧰 3. Raise and support the rear
  • Chock the front wheels.
  • Lift the rear of the truck by the frame and place jack stands under the frame rails.
  • Lower the truck gently onto the stands and leave the jack under the rear axle as a backup (not as main support).

1500 - Remove Fuel Tank 🛠️

• 🧰 4. Support the fuel tank
  • Place a transmission jack or floor jack with a wide wood block under the center of the tank.
  • Apply light upward pressure to hold the tank.
• 🧰 5. Disconnect filler neck and vent hoses
  • At the rear/side of the tank, loosen the hose clamps on the large filler hose and smaller vent hose using a flat screwdriver or 8mm socket.
  • Twist and pull the hoses off the tank fittings. Twisting first helps break them loose.
• 🧰 6. Unplug electrical connectors
  • Locate the fuel pump electrical connector on top/front of the tank (you may need to lower the tank slightly to see it).
  • Press the tab and unplug the connector.
  • Disconnect any additional small connectors (EVAP/vent) attached to the tank.
• 🧰 7. Disconnect EVAP lines
  • Find the small plastic lines going to the tank (EVAP/vent lines).
  • Use your fingers or a small pick to release the quick-connect tabs and pull the lines off gently.
  • Do not force them; they can crack if pried too hard.
• 🧰 8. Remove tank straps
  • Support the tank firmly with the jack.
  • Remove the fuel tank strap bolts (usually 15mm or 18mm) at the rear of each strap.
  • Rotate the straps down and away from the tank.
• 🧰 9. Lower the tank
  • Slowly lower the jack and tank a few inches.
  • Check for any remaining hoses or connectors; disconnect them as needed.
  • Lower the tank fully and slide it out from under the truck.

1500 - Replace Fuel Pump Module 🔄

• 🧰 10. Clean around pump opening
  • Use compressed air or a brush to clean dirt around the pump lock ring on top of the tank.
  • Keeping dirt out prevents damage to the new pump.
• 🧰 11. Remove lock ring
  • Use a fuel pump lock-ring tool with a hammer, or a brass punch and hammer.
  • Tap the ring counterclockwise until it unlocks and can be lifted off.
• 🧰 12. Remove old pump module
  • Lift the pump module straight up, tilting slightly to clear the float arm.
  • Remove and discard the old O-ring seal.
• 🧰 13. Install new pump module
  • Lightly coat the new O-ring with clean engine oil or fuel.
  • Place the new O-ring in the groove on the tank.
  • Carefully lower the new pump module into the tank, guiding the float arm in without bending it.
  • Align the marks on the pump flange and tank (note orientation of connectors/lines).
• 🧰 14. Install lock ring
  • Install the lock ring and tap it clockwise with the lock-ring tool or brass punch until fully seated and aligned with the stops.

1500 - Reinstall Fuel Tank 🔁

• 🧰 15. Position tank under truck
  • Slide the tank back under the truck and onto the jack.
  • Raise it slowly into position, watching hoses and wiring.
• 🧰 16. Reinstall tank straps
  • Rotate the straps into place over the tank.
  • Install strap bolts and tighten to 30 ft‑lb (40 N·m).
• 🧰 17. Reconnect electrical and lines
  • Plug in the fuel pump electrical connector until it clicks.
  • Reconnect EVAP/vent lines to their fittings (listen/feel for a click).
  • Reconnect the filler hose and vent hose; tighten clamps to 27–44 in‑lb (snug, not crushed).
• 🧰 18. Lower the truck
  • Remove the jack from under the tank.
  • Raise the rear slightly, remove jack stands, and lower the truck to the ground.

1500 - Prime System & First Start 🚚

• 🧰 19. Reconnect battery and relay
  • Reconnect the negative battery cable and tighten the 10mm nut.
  • Reinstall the fuel pump relay in the fuse box.
• 🧰 20. Prime the fuel system
  • Turn the key to RUN (not start) for 5 seconds, then OFF.
  • Repeat 3–4 times. This builds fuel pressure.
• 🧰 21. Start and check for leaks
  • Start the engine. It may crank a bit longer the first time.
  • With the truck safely supported if needed, look under the truck and around the tank for any fuel leaks or drips.
  • If you see or smell fuel, shut off immediately and recheck connections.

1500 - Tips & Next Steps 💡

• 🧰 Good time to replace the fuel filter/strainer if not included with the module (most modules have it built in).
• 🧰 Keep the tank above ¼ full in daily use to help cool the pump and extend its life.

If you tell me roughly how full your tank is and what tools you have, I can tailor this to your exact situation and suggest any shortcuts or extra safety steps.

HowToo makes it easy: below this answer you’ll see the correct fuel pump module, new seal, and any specialty tools (lock-ring tool, fuel line disconnect set) you may need. You can add them to your cart right from the parts section, with fast shipping.