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 RepairsWater Pump Cleaning and Inspection Engine Cooling Coolant Pump
Cleaning ProcedureCaution:Do not immerse the water pump in solvent. The solvent mayenter the water pump's permanently lubricated bearings and causepremature bearing failure.Remove the old gasket material from the water pump sealingsurfaces.Clean all excess dirt and debris from the water pumphousing. ...