I need "step by step" instructions on how to replace the fuel filter on my 2001 Dodge Ram 3500 pickup. Thanks !

If its a gas engine there iss no fuel filter, just a sock on the pump pickup

Here you go if it is a diesel:
A. FUEL FILTER REPLACEMENT:
The fuel filter is located inside of the fuel filter housing
1. Unscrew and remove fuel filter cap at top of fuel filter housing. To unscrew, attach tool to 6-sided hex center of cap. Do not loosen cap at outer edge. The fuel filter cap is designed to remove filter while pulling up on cap.
2. Remove O-ring from cap and discard.
3. The filter is retained to cap with little fingers. Carefully pry a couple of them off from old filter.
B. FUEL FILTER REPLACEMENT:
1. Thoroughly clean inside of filter housing, cap, etc. with clean diesel fuel
2. Fill filter housing (canister) with clean diesel fuel. NOTE: If you do not do this, you will have to manually bleed air out of system later. No fun.
3. Snap new fuel filter to bottom of cap.
4. Install new O-ring
5. Apply lihgt film of clean diesel oil to cap O-ring
6. Load filter/cap into housing.
7. Tighten cap to 25 ft. lbs. torque. Do NOT over-tighten.