How to Replace the Fuel Pump on a 2003 Dodge Ram

by James Marshall
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Dodge Ram trucks include the 1500, 2500 and 3500 series. These trucks have a variety of engine sizes, and are available with 2-wheel drive and 4-wheel drive transmissions. Dodge Ram trucks use sequential fuel injection, which requires an electric fuel pump that produces very high pressure. The procedure for replacing the fuel pump in a Dodge Ram truck is similar for all models and trim levels from 2001 to 2005.

Step 1

Disconnect the fuel vent hose from the fuel vent fitting located on the outer portion of the left frame rail. Attach one end of hose no. 6541, 6539, 6631 or 6923 to this fuel vent fitting. The correct hose depends on the specific model and engine of your vehicle. Siphon the fuel from the fuel system into a gasoline container. Connect the fuel vent hose to the fuel vent fitting.

Step 2

Remove the filler tube cap for the fuel tank. Raise and support the vehicle on jack stands. Disconnect the cable from the negative battery terminal with a socket wrench.

Step 3

Disconnect the electrical wiring harness and fuel lines from the fuel pump module. Remove the fuel tank. Turn the locknut on the fuel pump module counter-clockwise with special tool 6856, and remove the locknut. Remove the fuel pump module from the fuel tank.

Step 4

Install the new fuel pump module onto the fuel tank. Place the locknut into position and turn it clockwise with special tool 6856 until it locks into place. Install the fuel tank, and connect the wiring harness and fuel lines to the fuel pump module.

Step 5

Connect the cable for the negative battery terminal with a socket wrench. Lower the vehicle and replace the filler tube cap for the fuel tank. Start the engine and inspect the fuel system for leaks.

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