Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000mi.Have underbody flushing service performed. See "Underbody Maintenance" inExterior Care.
Power Mode Description and Operation
GMLAN and Media Oriented Systems Transport (MOST) Wiring RepairsPositive Crankcase Ventilation Tube Replacement - Front Emissions PCV
..Positive Crankcase Ventilation Tube Replacement - FrontCalloutComponent NamePreliminary ProcedureRemove the intake manifold cover. Refer toIntake Manifold Cover Replacement.1Positive Crankcase Ventilation Tube ...