The first step to replace the 2500 series Fuel Tank filler pipe requires removal of the rear Fuel Tank. First remove the chassis wiring harness ground bolt followed by the left rear lamp ground wire and fill pipe ground strap from their frame attachments. First detach the axle vent hose clip from the fill pipe neck. Next relax the Fuel Tank fill hose clamp around the front tank and separate the evap fuel fill hose quick connect fitting from the Fuel Tank line. Start the procedure by removing the fuel fill hose from the front tank then taking out its crossmember integral clamp before removing the fuel fill hose/pipe assembly. Apply Fuel Tank caps to seal both open fittings as well as the fuel/evap lines to protect against contamination. Disassembly of all parts comprising the evaporative emission canister hose , canister hose clamp , fill pipe clamp , housing bolts , housing , fill pipe restrictor , vent hose and fill hose clamp must be completed when replacing any functional part of the fill pipe assembly. The assembly process requires the Fuel Tank fill hose clamp to reach 2.5 nm (22 lb in) tightness alongside the fill pipe, canister hose clip, fill hose clamp set to 2.5 nm (22 lb in), vent hose, fill pipe clamp at 2.5 nm (22 lb in), fill pipe restrictor, housing, housing bolts fastened to 2.3 nm (20 lb in), fill pipe clamp set to 2.5 nm (22 lb in), and canister hose clamp tightened to 2.5 nm (22 lb in). Users must remove caps from the front Fuel Tank openings and fuel/evap lines to install the fuel fill hose/pipe assembly by connecting it to the front tank. The Fuel Tank fill hose clamp should be tightened to 2.5 nm (22 lb in) before you install the integral clamp to the crossmember and connect the rear axle vent hose clip to the fill pipe neck. Fasten the fill pipe ground strap to the left rear lamp ground wire before installing both to the frame and using the chassis wiring harness ground bolt with a torque of 9 nm (80 lb in). Replace the rear Fuel Tank as the last installation step.