Installation Procedure

WARNING: In order to reduce the risk of fire and personal injury that may result from a fuel leak, always install the fuel injector O-rings in the proper position. If the upper and lower O-rings are different colors (black and brown), be sure to install the black O-ring in the upper position and the brown O-ring in the lower position on the fuel injector. The O-rings are the same size but are made of different materials.

CAUTION: Refer to Fuel Rail Caution .

Fig 1: Fuel Rail Assembly & Fuel Injectors

Courtesy of GENERAL MOTORS CORP.

The O-rings must be replaced on all components that are serviced.
Lightly oil the fuel injector O-rings with clean engine oil.
Place the fuel rail (1) with the fuel injectors (3) on the intake manifold.
Seat the fuel injectors (3) by HAND.

CAUTION: Refer to Fastener Caution .

Install the fuel rail hold-down nuts (2).
Tighten: Tighten the nuts to 10 N.m (89 lb in).

Fig 2: View Of Fuel Injector Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Connect the fuel injector electrical connectors.
Reposition the spark plug wires to the fuel rail.
Connect the spark plug wires to the ignition control module.

Fig 3: Female Connector & Fuel Rail Pipe

Courtesy of GENERAL MOTORS CORP.

Connect the fuel feed pipe (1) to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
Tighten the fuel fill cap.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L26) .
Inspect for leaks.
1. Turn ON the ignition for 2 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Turn ON the ignition.
4. Inspect for fuel leaks.
Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .