K 2500 Truck 4WD V8-6.5L DSL Turbo VIN S (1998)
Fuel Return Line: Description and Operation
Fuel Pipes and Hoses
MATERIALS
FUEL LINES
These are welded steel tubes, meeting GM Specifications 124-M, or its equivalent. The fuel feed line is 3/8" diameter and the fuel return line is
5/16" diameter. Not use copper or aluminum tubing to replace steel tubing. Those materials do not have satisfactory durability to withstand
normal vehicle vibration.
COUPLED HOSE
These are not to be repaired and are replaced only as an assembly.
UNCOUPLED HOSE
Use only reinforced furl resistant hose, made of "Fluoroelastomer" material. Do not use a hose within 4" (100 mm) of any part of the exhaust
system. The hose's inside diameter must match the outside diameter of the steel tubing.
CLAMPS
These are stainless steel, screw bank-type clamps, #2494772, or equivalent.
