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 RepairsMaintenance Schedule
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level. See
Engine Oil.
Once a Month
Check the tire inflation
pressures. See Tire Pressure.
Inspect the tires for wear. See
Tire Inspection.
Check the windshield washer
fluid level. See Wa ...