Silverado 2500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
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 controller electrical connector.
23. Disconnect the glow plug controller battery feed electrical connector (1).
24. Remove the positive crankcase ventilation (PCV) hose/pipe.
