Installation Procedure

Fig 1: View Of Fuel Injector And Retainer Clip

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Different injectors are calibrated for different flow rates. When ordering new fuel injectors, be certain to order the identical part number that is inscribed on the old injector.

Lubricate the new fuel injector O-rings with engine oil.
Install the new O-rings on the fuel injectors.
Install the fuel injectors into the fuel rail sockets with the fuel injector terminals facing outward.
Install the fuel injector retaining clips onto the fuel injector and the fuel rail ledge.

Fig 2: Identifying Fuel Injector Wiring Harness Connectors And Fuel Rail Assembly

Courtesy of GENERAL MOTORS CORP.

Ensure that the clips are parallel to the fuse injector harness connector.
Install the fuel rail assembly into the cylinder head.
Connect the fuel injector wiring harness connector.

Fig 3: View Of Intake Manifold And Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Install the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical - 2.5L.
Connect the fuel feeding pipe to the fuel rail.

Fig 4: Identifying Fuel Rail Components

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the fuel pressure regulator. Refer to Fuel Pressure Regulator Replacement .
Tighten: Tighten the fuel pressure regulator retaining bolts to 12 N.m (106 lb in) .
Connect the negative battery cable.
Perform a leak check of the fuel rail and fuel injectors.