C Yukon 2WD V8-5.7L VIN R (1999)
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Cautions and Notices.
1. Connect the fuel feed and return pipes to the engine fuel pipes (1).
Tighten
Fuel pipe attaching nuts to 27 N.m (20 lb ft) using a back-up wrench.
2. Position new fuel pipe harness in original location and fuel pipe harness attaching hardware (2).
3. Connect the fuel feed pipe to the fuel filter and the return pipe to the union (3).
4. Connect the quick-connect fittings for the fuel and vapor pipes at the fuel sender assembly (1).
5. Install the fuel tank and attaching hardware (2) if the tank was removed.
6. Tighten the fuel filler cap.
7. Connect the negative battery cable.
8. Check for fuel leaks.
8.1. Turn the ignition switch to the ON position for 2 seconds.
8.2. Turn the ignition switch to the OFF position for 10 seconds.
8.3. Again, turn the ignition switch to the ON position.
8.4. Check for fuel leaks.
Fuel Pipe Repair
Steel fuel lines - These are welded steel tubes, meeting GM specifications 124-M, or its equivalent. The fuel feed line is 3/8 inches diameter and the fuel
return line is 5/16 inches diameter. Do not use copper or aluminum tubing to replace steel tubing. Those materials do not have satisfactory durability to
withstand normal vehicle vibration.
Coupled hose - Do not repair the hoses. Replace them only as an assembly.
