66000 MI or 105600 KM

Lubricate
    Steering and Suspension
      Or every 3 months, whichever occurs first. Lubricate the front suspension, kingpin bushings, ball joints, steering linkage, and rear driveline center splines.
Inspect
    Fluid - Differential
      Inspect fluid level and add fluid as needed. 2500 and 3500 Series Only; If driving in dusty areas or towing a trailer, drain fluid and refill every 25 000 km (15,000 miles). More frequent lubrication may be required for heavy-duty or off-road use.
    Brakes and Traction Control
Replace
    Oil Filter, Engine
      Or every 3 months, whichever occurs first.
    Engine Oil
      Or every 3 months, whichever occurs first.
Rotate
    Tires