Use Maintenance I if the Change Engine Oil light comes on within 10 months since the vehicle was purchased or Maintenance II was performed.
Use Maintenance II if the previous service performed was Maintenance I. Always use Maintenance II when the Change Engine Oil light comes on 10 months or more since the last service, or if the light has not come on at all for one year.
Every 15,000 miles
• Diesel trucks: Fuel filter service
25,000 miles
• Inspect fuel system for damage or leaks
• Inspect exhaust system for loose or damaged components
50,000 miles
• Change automatic transmission fluid and filter (severe service)
• Change transfer case fluid
100,000 miles
• Change automatic transmission fluid and filter (normal service)
• Change transfer case fluid
• Replace spark plugs and inspect spark plug wires
• Inspect PCV valve
150,000 miles
• Change automatic transmission fluid and filter (severe service)
• Change transfer case fluid
• Engine cooling system service (or every 5 years, whichever occurs first)