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:

    Four-Wheel Drive
    If the vehicle has Four-Wheel Drive, you can send the engine's driving power to all four wheels for extra traction. ...

    Ride & Handling
    Whenever I approach a vehicle this large I bring along the expectation that it will be hard to maneuver. In the Yukon I was surprisingly sure of myself, even on the tightest city streets. Not only ...

    Fuel Gauge
    Metric English When the ignition is on, the fuel gauge shows how much fuel is left in the tank. An arrow in the fuel gauge indicates the side of the vehicle the fuel door is on. The gauge will ...