Installation Procedure

Fig 1: Fuel Rail Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

Install the 2 outer fuel rail bolts (1) first, hand tight and install the remaining 2 bolts, hand tight.
Connect the fuel injector wiring harness electrical connectors to the fuel injectors.

CAUTION: Refer to Fastener Caution .

Tighten the fuel rail bolts in the sequence shown.
1. Tighten the bolts a first pass to 22 N.m (16 lb ft).
2. Tighten the bolts a final pass to 22 N.m (16 lb ft).
Install the fuel feed intermediate pipe. Refer to Fuel Feed Intermediate Pipe Replacement .

Fig 2: View Of Engine Wiring Harness & High Pressure Fuel Pump

Courtesy of GENERAL MOTORS CORP.

Connect the engine wiring harness electrical connector (1) to the high pressure fuel pump.
Install the engine wiring harness clip (3) to the high pressure fuel pump cover.

Fig 3: Fuel Injector Insulator

Courtesy of GENERAL MOTORS CORP.

Fig 4: Identifying Engine Wiring Harness Connector & Fuel Injector Wiring Harness Connector

Courtesy of GENERAL MOTORS CORP.

Connect the engine wiring harness electrical connector (1) to the fuel injector wiring harness electrical connector.
Inspect for 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, with the engine OFF.
4. Inspect for fuel leaks.
Install the low side fuel pressure service port cap.
Tighten the fuel fill cap.
Install the intake manifold assembly. Refer to Intake Manifold Replacement .