Pontiac 1998 Grand Am Owner's Manual page 307

Maintenance Schedule
Long Tripmighway Definition
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:
Long Tripmighway 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). Tire Rotation.
Every 30,000 Miles (50 OOO k m ) : Air Cleaner Filter
Replacement. Fuel Tank, Cap and Lines Inspection.
Every
50,000 Miles (83 OOO
k m ) : Automatic Transaxle
Service (severe conditions only).
Every 60,000
Miles
(100
000 km): Engine Accessory
Drive Belt Inspection.
Every 1 0 0 , O O O Miles (166 0oO
km):
Spark Plug Wire
Inspection. Spark Plug Replacement.
Every
150,000
Miles
(240 000 k m ) : 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.