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 RepairsCatalytic Converter Replacement (LEA) Emissions Catalytic Converter
Catalytic Converter ReplacementCalloutComponent NameWarning:Refer toHot Exhaust System Warning.Preliminary ProcedureRaise and support the vehicle. Refer toLifting and Jacking the Vehicle.Remove the exhaust manifold. Refer toExhaust Manifold Replacement.Remove the oxygen sensor after the catalytic co ...