GMC SIERRA 1997 Manual page 359

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Maintenance Schedule
-
Short
Trip/City Definition
--
Gasoline Engines
Follow the Short TripKity 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.
Most trips include extensive idling (such as frequent
You operate your vehicle in dusty areas or
You frequently tow a trailer.
If the vehicle is used for delivery service, police, taxi
One
o f
the reasons you should follow this schedule
if
you
operate your vehicle under any o f these conditions i s that
these conditions cause engine oil to break down soonel:
Short Trip/City Intervals
--
Gasoline Engines
Every 3,000 Miles (5 000 km): Engine Oil and Filter
or other commercial application.
Change (or 3 months, whichever occurs first). Chassis
Lubrication (or 3 months, whichever occurs first). Drive
Axle Service (or 3 months, whichever occurs fmt).
Short
Trip/City Intervals
--
Gasoline Engines
Every 6,000 Miles (10 000 km): Tire Rotation.
Every 15,000 Miles (25 000 km): Shields and
Underhood Insulation Inspection (GVWR above
8,500 lbs. only). 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 (vehicles over 8600 GVWR or
driven under 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):
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.

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