3500 4x4 Pickup L6-359 5.9L DSL Turbo (1996)
2. Pry tab and slide retaining clip off of pump.
3. Remove reservoir, then return tube as follows:
a. Install five 5/8 inch washers and a 9/16-12 nut outside of tube.
b. Plug tube to prevent chips from entering, then insert a 9/16-12 tap into return tube and turn until tube is pulled out of housing.