Silverado 3500 2WD V8-6.6L DSL Turbo (2006)
18. Disconnect the barometric sensor electrical connector.
19. Remove the engine harness main connector bracket bolts.
20. Remove the water outlet tube.
21. Remove the auxiliary generator, if equipped.
22. Disconnect the glow plug control module electrical connectors (1, 2).
23. Remove the positive crankcase ventilation (PCV) hose/pipe.