Sierra 3500 4WD V8-6.0L (2008)
7. Remove the connector position assurance (CPA) retainer (2).
8. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
9. Disconnect the engine wiring harness electrical connectors (3) from the fuel injectors, perform the following:
1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
2. Pull the CPA retainer on the connector up 1 click.
3. Push the tab on the connector in.
4. Disconnect the fuel injector electrical connector.
10. Remove the CPA retainer (2).
11. Disconnect the engine wiring harness electrical connector (1) from the ignition coil main electrical connector.
12. Disconnect the engine wiring harness electrical connector (3) from the electronic throttle control.
13. Disconnect the engine wiring harness electrical connectors (7) from the fuel injectors, perform the following:
1. Mark the connectors to their corresponding injectors to ensure correct reassembly.
2. Pull the CPA retainer on the connector up 1 click.
3. Push the tab on the connector in.