37500 MI or 60000 KM

Lubricate
    Steering and Suspension
      Or every 12 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).
    Brakes and Traction Control
Replace
    Oil Filter, Engine
      Or every 12 months, whichever occurs first.
    Engine Oil
      Or every 12 months, whichever occurs first.
Rotate
    Tires