GMC 1996 Suburban Owner's Manual page 332

Maintenance Schedule
Short Trip/City Definition
--
Gasoline Engines
Follow the Short Trip/City Maintenance Schedule if any
one of these conditions is true for your vehicle:
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
driving in stop-and-go traffic).
off-road frequently.
your vehicle.
or other commercial application.
0
Most trips include extensive idling (such as frequent
0
You operate your vehicle in dusty areas or
You frequently tow a trailer or use a carrier on top of
0
If the vehicle is used for delivery service, police, taxi
One
o f
th.e reasons you should follow this schedule
if
you
operute your vehicle under uny
qf
these conditiorzs is tlmt
these conditions cause engine oil to break dmvn s o o ~ e ~
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).
At 6,000 Miles (10 000 km)
--
Then Every
12,000 Miles (20 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only). Thermostatically Controlled Engine
Cooling Fan Check (or every 12 months, whichever
occurs first). 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.
Every 100,000 Miles (166 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
Spark Plug Wire Inspection. Spark Plug Replacement.
Positive Crankcase Ventilation (PCV) Valve Inspection.
These intervals only summarize wmintennnce services.
Be mre to.follow the complete maintenance schedule on
the~following pages.
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