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Scheduled Maintenance
7-7
Long Trip/Highway Definition
Follow this scheduled maintenance only if none of the
conditions from the Short Trip/City Scheduled
Maintenance are true. Do not use this schedule if the
vehicle is used for trailer towing, driven in a dusty area
or used off paved roads. Use the Short Trip/City
schedule for these conditions.
Driving a vehicle with a fully warmed engine under
highway conditions causes engine oil to break
down slower.
Long Trip/Highway Intervals
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every 12 months, whichever occurs first).
Chassis Lubrication (or every 12 months, whichever
occurs first). Rear Axle Fluid Check. Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection. Diesel Engine
Only: Thermostatically Controlled Engine Cooling
Fan Check (or every 12 months, whichever
occurs first). Diesel Engine Only: Air Intake
System Inspection.
Every 30,000 Miles (50 000 km): Rear Axle
Fluid Change with High Speed Use. Fuel Filter
Replacement. Front Wheel Bearing Repack
(or at each brake relining, whichever occurs first).
(Continued)