K 2500 Suburban 4WD V8-5.7L VIN R (1999)
Uncoupled hose - Use only reinforced fuel resistant hose, made of Fluoroelastomer material. Do not use a hose within 4 inches (100 mm) of any part of
the exhaust system, or within 10 inches (2154 mm) of the catalytic converter. The hoses inside diameter must match the outside diameter of the steel
tubing.
Clamps - These are stainless steel, screw bank-type clamps, #2494772, or equivalent.
Steel Fuel Line Repair
1. Cut a piece of fuel hose 4 inches (100 mm) longer than the section of line to be removed. If you remove more than 6 inches (152 mm), use a
combination of steel pipe and hose. The hose length should not be more than 10 inches total.
2. With a tube cutter, cut a section of the pipe to replace. Use the first step on the reamer to form a bead on the ends of the pipe and, also, on the
new section of pipe, if used.
3. Slide the hose clamps onto the pipe and push the hose 2 inches (51 mm) onto each portion of the fuel pipe. Tighten a clamp on each side of
the repair.
4. Secure fuel line to the frame.
5. Check for leaks.
Fuel Vapor Pipes
REMOVAL PROCEDURE
NOTE:
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Do not attempt to straighten kinked nylon pipes. Replace any kinked nylon pipes in order to prevent damage to the vehicle.
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Do not attempt to repair sections of nylon pipes. Replace damaged nylon pipes.
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Replace the vapor pipes with original equipment or parts that meet GM specifications.
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Replace the vapor hoses with original equipment or parts meeting GM specifications. Use only reinforced fuel-resistant hose identified with
the word Fluoroelastomer or GM 6163M on the hose.
CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure.
3. Disconnect the fittings (1) at the engine compartment fuel feed and return pipes.
4. Disconnect the fuel pipe attaching hardware (2).
5. Disconnect the fuel feed and return pipe nuts at the fuel filter and the return pipe union (3).
6. Remove the fuel tank.
