Sierra 3500 4WD V8-6.0L VIN U (2004)
6. Connect the fuel feed pipe (1) to the fuel rail.
7. Install the PCV hose.
8. Perform the following steps in order to connect the fuel injector electrical connectors.
8.1.
Install the connectors to their corresponding injectors to ensure correct reassembly.
8.2.
Connect the fuel injector electrical connector.
8.3.
Push the CPA retainer (2) on the connector in 1 click.
8.4.
Repeat the steps for each injector electrical connector.