45000 MI or 72000 KM

Inspect
    Fluid - Differential
      Check the rear axle fluid level and add fluid as needed.
    Air Filter Element
      Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change.
Replace
    Oil Filter, Engine
    Engine Oil
      Change engine oil and filter as indicated by the GM Oil Life System (or every 12 months, whichever occurs first). Reset the system.