GMC 1999 Suburban, Owner'S Manual, Page: 355 / 424

Scheduled Maintenance
yellow blue
7-5
Short Trip/City Definition -- Gasoline Engines
Follow the Short Trip/City Scheduled Maintenance if
any one of these conditions is true for your vehicle:
D Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
D Most trips include extensive idling (such as frequent
driving in stop
-
and
-
go traffic).
D You operate your vehicle in dusty areas or off
-
road
frequently.
D You frequently tow a trailer or use a carrier on top of
your vehicle.
D If the vehicle is used for delivery service, police, taxi
or other commercial application.
One of the reasons you should follow this schedule if
you operate your vehicle under any of these conditions
is that these conditions cause engine oil to break
down sooner.
Short Trip/City Intervals -- Gasoline Engines
Every 3,000 Miles (5 000 km): Engine Oil and
Filter Change (or 3 months, whichever occurs first).
Chassis Lubrication (or 3 months, whichever occurs
first). Drive Axle Service (or 3 months, whichever
occurs first).
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Front Wheel
Bearing Repack (2WD only) (or at each brake
relining, whichever occurs first).
Every 30,000 Miles (50 000 km): Fuel Filter
Replacement.
Every 50,000 Miles (83 000 km): Automatic
Transmission Service (severe conditions only).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and Lines
Inspection. Exhaust Gas Recirculation System
Inspection. Evaporative Control System Inspection.