Buick 2003 LeSabre Owner's Manual page 356

First you'll need to decide which of the two schedules
is right for your vehicle. Here's how to decide which
schedule to follow:
Short TripKity Definition
Follow the Short Trip/City Scheduled Maintenance if any
one of these conditions is true for your vehicle:
Most trips are less than 5 miles (8 km). This is
particularly important when outside temperatures
are below freezing.
Most trips include extensive idling (such as frequent
driving in stop-and-go traffic).
You frequently tow a trailer or use a carrier on top
of your vehicle.
If the vehicle is used for delivery service, police,
taxi or other commercial application.
One of the reasons you should follow this schedule if
is that these conditions cause engine oil to break
down sooner.
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n F
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ly
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Every 3,000 Miles (5
000
km): Engine Oil and Filter
Change (or 3 months, whichever occurs first).
Every 6,000 Miles (10
000
km): Tire Rotation.
Every 15,000 Miles (25 000 km): Engine Air Cleaner
Filter Inspection, if driving in dusty conditions.
Every 30,000 Miles (50
000
km): Engine Air Cleaner
Filter Replacement.
Every 50,000 Miles (83 000 km): Automatic Transaxle
Service (severe conditions only).
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Automatic
Transaxle Service (normal conditions).
Every 150 000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
Engine Accessory Drive Belt Inspection.
These intervals only srlmmari7e maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.
6-5