Installation Procedure

Lightly lubricate the new lower fuel injector O-ring seals (4) with mineral oil GM P/N 9981704.
Install the new O-ring seals (4) on the spray tip end of each fuel injector (3).

Fig 1: View Of Fuel Injector, Clip & O-Rings

Courtesy of GENERAL MOTORS CORP.

Position the fuel rail to the cylinder head, inserting the spray tip ends of the fuel injectors.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the fuel rail bolts.
Tighten: Tighten the fuel rail bolts to 10 N.m (89 lb in).

Fig 2: View Of Fuel Rail Assembly

Courtesy of GENERAL MOTORS CORP.

Connect the fuel injector harness connector (2) to the engine wiring harness electrical connector.

Fig 3: View Of ECT Sensor, Fuel Injector, Ignition Coil & HO2S Engine Wiring Harness Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Install the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical-2.8L (LK5).
Refer to Quick Connect Fitting(s) Service (Plastic Collar) in order to connect the EVAP purge hose (1) to the following:
- The throttle control module (2)
- The EVAP canister purge solenoid valve (3)

Fig 4: View Of EVAP Canister Purge Pipe, Throttle Body Module & EVAP Canister Purge Solenoid Valve

Courtesy of GENERAL MOTORS CORP.

Connect the atmospheric vent hose (2) to the following:
- The air cleaner resonator (1)
- The fuel pressure regulator (3)

Fig 5: View Of Air Cleaner Resonator, Atmospheric Vent Hose & Fuel Pressure Regulator

Courtesy of GENERAL MOTORS CORP.

Refer to Quick Connect Fitting(s) Service (Metal Collar) in order to connect the following to the fuel rail:
- The fuel return hose/pipe (1)
- The fuel feed hose/pipe (2)

Fig 6: View Of EVAP Pipes, Fuel Pipes, Oil Indicator Tube, & Engine Wiring Harness Bracket

Courtesy of GENERAL MOTORS CORP.

Inspect for leaks.
1. Turn ON the ignition, with the engine OFF for 2 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Inspect for fuel leaks.