The first step to replace the filler pipe of the 2500 series Fuel Tank involves removing the rear Fuel Tank. Start by unfastening the chassis wiring harness ground bolt as well as the left rear lamp ground wire and fill pipe ground strap which mounts to the frame. First disconnect the rear axle vent hose clip from the fill pipe neck. Then loosen the Fuel Tank fill hose clamp located at the front tank while removing the fuel fill hose evaporative emission (EVAP) line quick connect fitting from the Fuel Tank line. Start by removing the front tank fuel fill hose together with the integral clamp secured to the crossmember before you disassemble the fuel fill hose/pipe assembly. Gas contamination will be prevented by using caps on both the Fuel Tank's opening and the fuel and evap lines' open ends. The replacement process for any serviceable component of the fill pipe assembly starts with separating it by unbonding the evaporative emission canister hose followed by unclamping the canister hose clamp and Fuel Tank fill pipe clamp and removing the fill pipe housing bolts then dismantling the fill pipe housing and fill pipe restrictor plus the fill pipe clamp and vent hose and fill hose clamp before releasing the canister hose clip and fill pipe. The assembly process requires torquing the Fuel Tank fill hose clamp to 2.5 nm (22 lb in) as well as tightening the fill pipe , canister hose clip , fill hose clamp to 2.5 nm (22 lb in), vent hose , fill pipe clamp to 2.5 nm (22 lb in), fill pipe restrictor , fill pipe housing , fill pipe housing bolts to 2.3 nm (20 lb in), fill pipe clamp to 2.5 nm (22 lb in), and canister hose clamp to 2.5 n start installation by removing protective covers from both ends of the front Fuel Tank and fuel/evap tubes before adding the fuel fill hose/pipe component and securing the front tank hose connection. Fasten the quick connect fitting between the Fuel Tank line and fuel fill hose evap line while tightening the Fuel Tank fill hose clamp to 2.5 nm (22 lb in). Install the integral clamp to the crossmember and attach the rear axle vent hose clip to the fill pipe neck. The fill pipe ground strap needs to be placed at the left rear lamp ground wire before attaching both to the frame and inserting the chassis wiring harness ground bolt with 9 nm (80 lb in) torque. The last step includes reinstalling the rear Fuel Tank.