Fuel Rail Transfer Line Replacement - L81: Installation

1. Install fuel transfer line into position.
   NOTE: To avoid damaging fuel rail assemblies, support fuel rail fittings with open-end wrench during installation.
   Fig 1: Installing Fuel Transfer Line Into Position

   Courtesy of GENERAL MOTORS CORP.
2. Hand tighten both fuel transfer line fittings to fuel rails.

   Torque: 

   Fuel Transfer Line Fittings-to-Fuel Rail - L81: 15 N.m (11 ft-lbs) 

3. Install fuel line bracket to manifold

   Torque: 

   Fuel Line Bracket-to-Manifold Bolt: 6 N.m (47 in-lbs) 

4. Install intake manifold.
5. Install fuel transfer line bracket bolt intake manifold.

   Torque: 

   Fuel Transfer Line Bracket Bolt-to-Intake - L81: 4.4 N.m (39 in-lbs) 

   Fig 2: Installing Fuel Transfer Line Bracket Bolt Intake Manifold

   Courtesy of GENERAL MOTORS CORP.
6. Install outlet resonator/duct assembly bracket to manifold.
7. Install outlet resonator/duct assembly bracket nuts.

   Torque: 

   Outlet Resonator/Duct Assembly Bracket-to-Intake Manifold Nuts - L81: 5 N.m (44 in-lbs) 

   IMPORTANT:  An audible click noise can be heard when fuel line is installed. Slightly pull rearward on line to assure connection is fully seated.

   Fig 3: Installing Outlet Resonator/Duct Assembly Bracket Nuts

   Courtesy of GENERAL MOTORS CORP.
8. Connect fuel line to fuel transfer line.
9. Install outlet resonator/duct assembly into position.
10. Tighten clamp at throttle body assembly.
11. Position outlet resonator/duct assembly to support bracket and install bolts.

    Torque: 

    Outlet Resonator/Duct Assembly-to-Support Bracket Bolts - L81: 10 N.m (89 in-lbs) 

    Fig 4: Installing Outlet Resonator/Duct Assembly

    Courtesy of GENERAL MOTORS CORP.
12. Tighten clamp at air cleaner assembly.
13. Connect negative battery cable.

Torque: 

Battery Terminal Bolts: 17 N.m (13 ft-lbs)