Long Tripmighway Definition - GMC 1998 Safari Owner's Manual

Maintenance Schedule
I
Short Trip/City Intervals
. I
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete maintenance schedule
on
the following pages.
I
Long Trip/Highway Definition
I
Follow this maintenance schedule only if none of the
conditions from the Short TripKity Maintenance
Schedule is 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 TripKity schedule for
these conditions.
Driving a vehicle with a fully warmed engine
under highway conditions causes engine oil to
break down slower.
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