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 RepairsPiston, Connecting Rod, and Bearing Cleaning and Inspection Engine Block Cylinder Block Piston Assembly
Cleaning ProcedureNote:DO NOT wire brush any part of the piston.Clean the piston skirts and the pins with a cleaningsolvent.Clean the piston ring grooves with a groove cleaner. Ensurethat the oil ring holes and slots are clean.Warning:Refer toSafety Glasses Warning.Dry the piston with compressed air ...