Special Application Services

• Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi.
• Have underbody flushing service performed once a year.

    See also:

    Fuel
    For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement. For Vehicles with gasoline engines, please read this. ...

    Engine Coolant
    The cooling system in the vehicle is filled with DEX-COOL® engine coolant. This coolant is designed to remain in the vehicle for 5 years or 240 000 km (150,000 mi), whichever occurs first. The follo ...

    Radio(s)
    VOL/ : Press to turn the system on and off. Turn to increase or decrease the volume. SOURCE: Press to choose between FM, AM, XM™, if equipped, CD, or AUX. MENU/SEL: Turn to select radio station ...