C Yukon 2WD V8-5.7L VIN R (1999)
Fuel Supply Line: Service and Repair
Fuel Hose/Pipes Assembly Replacement
Fuel Pipes Side Tank
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 (3) and the return pipe union.
6. Remove the fuel tank.
7. Disconnect the fuel feed and vapor hoses (1). On 4DR Utility, the quick-connect fittings at the fuel sender assembly.
8. Remove the hardware retaining section of pipe to be replaced (2). Note location of attaching hardware for installation.
9. Remove the section of pipe and hoses.
10. Remove rust or burrs from the engine compartment fuel pipes by the following procedure:
10.1. Use emery cloth in a radial motion with the fuel pipe end in order to prevent damage to the O-ring sealing surface.
10.2. Using a clean shop towel, wipe off the male tube ends.
10.3. Inspect all the connectors for dirt and burrs. Clean or replace the components/assemblies as required.
