CTS V6-2.8L (2006)
14. Disconnect the left bank ignition coil harness electrical connector.
15. Remove the PCV line from the clip on the harness bracket.
16. Remove the left bank ignition coil wiring harness from the bracket.
17. Remove the injector harness bracket bolt and bracket.
18. Remove the upper intake manifold bolts. Some deflection of the cowl panel may be necessary to extract the right rear bolt.
19. Remove the upper intake manifold with the throttle body.
20. If the upper intake manifold is being replaced, disassemble the intake manifold.
21. Clean and inspect the intake manifold.
