Special Application Services

• Allison Transmission™ Vehicles Only: Replace external transmission filter at first engine oil change only.
• Vehicles with Dual Wheels: Check dual wheel nut torque at 160 km/100 mi, 1 600 km/ 1,000 mi and 9 700 km/6,000 mi.
• 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:

    Removing the Spare Tire
    The compact spare tire is located under the vehicle, in front of the rear bumper. See Compact Spare Tire on page 10‑77 for more information. A. Rear Convenience Center B. Wrench (Three-Piece ...

    Cooling System
    If the vehicle has the Duramax® Diesel engine, see the Duramax® Diesel Supplement for more information. The cooling system allows the engine to maintain the correct working temperature. 5.3 L En ...

    Airbag On-Off Light
    If the vehicle has an airbag on-off switch, it also has a passenger airbag status indicator located in the overhead console. United States Canada and Mexico When the vehicle is started, the pas ...