Removal Procedure
Caution: In order to Reduce the Risk of Fire and Personal Injury:
• If nylon fuel pipes are nicked, scratched or damaged during installation,
Do Not attempt to repair the sections of the nylon fuel pipes. Replace them. • When installing new fuel pipes, Do Not hammer directly on the
fuel harness body clips as it may damage the nylon pipes resulting in a possible
fuel leak. • Always cover nylon vapor pipes with a wet towel before using a
torch near them. Also, never expose the vehicle to temperatures higher than
115°C (239°F) for more than one hour, or more than 90°C (194°F)
for any extended period. • Before connecting fuel pipe fittings, always apply a few drops
of clean engine oil to the male pipe ends. This will ensure proper reconnection
and prevent a possible fuel leak. (During normal operation, the O-rings located
in the female connector will swell and may prevent proper reconnection if
not lubricated.)
Notice: Replace the EVAP pipes and hoses with the original equipment or parts that meet the GM specifications for those parts. The replacement EVAP pipe must have the same type of fittings as the original pipe in order to ensure the integrity of the connection. When replacing EVAP hoses, use only reinforced fuel-resistant hose identified with the word Fluoroelastomer or GM 6163-M on the hose. The inside hose diameter must match the outside pipe diameter. Do not use rubber hose within 100 mm (4 in) of any part of the exhaust system or within 254 mm (10 in) of the catalytic converter.
Notice: Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering the open pipes and passages.
Important: Always maintain cleanliness when servicing fuel system components.
- Relieve the fuel system fuel pressure. Refer to Fuel Pressure Relief .
- Clean all engine fuel pipe connections.
- Clean areas surrounding the engine fuel pipe connections.
- Disconnect the fuel feed (1) and fuel return (2) pipe quick-connect fittings in the engine compartment. Refer to Plastic Collar Quick Connect Fitting Service .
- Disconnect the evaporative emission (EVAP) purge pipe at the EVAP purge valve.
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Disconnect the fuel return pipe quick-connect fitting at the fuel filter area. Refer to Plastic Collar Quick Connect Fitting Service .
- Disconnect the fuel feed pipe threaded fitting on the engine-side of the fuel filter.
- Disconnect the EVAP pipe at the fuel filter area.
- Cap the fuel filter and the fuel return pipe as needed to stop any fuel leakage.
- Note the position of the fuel and EVAP pipes and the fuel and EVAP pipe attaching hardware for installation.
- Remove the fuel feed, fuel return, and EVAP pipe attaching hardware, and the fuel feed, fuel return, and EVAP pipes.
- Inspect the pipes for bends, kinks and cracks.
- Replace the pipe or pipes as required.
Installation Procedure
Caution: In order to Reduce the Risk of Fire and Personal Injury: If nylon fuel pipes are nicked, scratched or damaged during installation, they must be replaced.
Notice: Always re-attach the fuel lines and fuel filter with all original type fasteners and hardware.
Do not repair sections of fuel pipes.- Install the new fuel feed, fuel return, or EVAP pipes and the fuel and EVAP pipe attaching hardware as noted during removal.
- Remove the caps from the fuel filter and the fuel return pipe.
- Connect the fuel return pipe quick-connect fitting at the fuel filter area. Refer to Plastic Collar Quick Connect Fitting Service .
- Connect the fuel feed pipe threaded fitting at the outlet of the fuel filter.
- Connect the EVAP pipe at the fuel filter area.
- Inspect and make sure all of the fuel pipe bundle clips, and fasteners are properly installed.
- Lower the vehicle.
- Connect the EVAP purge pipe at the EVAP purge valve.
- Connect the fuel feed (1), and fuel return pipe (2) quick-connect fittings in the engine compartment. Refer to Plastic Collar Quick Connect Fitting Service .
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- Inspect for leaks.
- Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
Important: If fuel line bundle attaching hardware is damaged or broken, then replace the fuel line bundle.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the fuel filter fitting to 30 N·m (22 lb ft).
| 11.1. | Turn ON the ignition for 2 seconds. |
| 11.2. | Turn OFF the ignition for 10 seconds. |
| 11.3. | Turn ON the ignition. |
| 11.4. | Inspect for fuel leaks. |
