Installation Procedure

Install the fuel injectors. Refer to Fuel Injector Replacement .
Connect the fuel injector harness connectors. Pull back to insure the connectors are locked in place.

IMPORTANT: Install new lower O-rings when reusing fuel injectors. Lubricate the injector tip O-rings prior to installing the injectors into the intake manifold.

Install the fuel rail using the following procedure:
1. With the fuel injectors positioned downward, lower the fuel injectors into the cylinder head ports.
2. Align the injectors by rotating the fuel rail forward.
3. Carefully push the fuel injectors into the cylinder head ports.

NOTE: Refer to Fastener Notice in Cautions and Notices.

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

Fig 1: View Of Fuel Rail

Courtesy of GENERAL MOTORS CORP.

Install the fuel supply pipe.
Tighten: Using a backup wrench on the fuel rail tighten the fuel supply pipe to 22 N.m (16 lb ft).
Install the coolant overflow pipe.
Tighten: Tighten the pipe bolt to 8 N.m (71 lb in).
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Inspect for fuel leaks using the following procedure:
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.
4. Inspect for fuel leaks.