Chevrolet 2003 Astro Owner's Manual page 344

97,500 Miles (162 500 km)
U Change engine oil and filter (or every 12 months,
0
Lubricate chassis components (or every 12 months,
0
Check readfront axle fluid level and add fluid as
whichever occurs first). An Emission Control Service.
whichever occurs first). (See footnote #).
needed. Check constant velocity joints and axle seals
for leaking.
page 5-64 for proper rotation pattern and additional
information. (See footnote +).
0
Rotate tires. See Tire Inspection and Rotation on
100,000 Miles (166 000 km)
0
Inspect spark plug wires. An Emission Control
U Replace spark plugs. An Emission Control Service.
Service.
0
If you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission fluid, change
both the fluid and filter.
150,000 Miles (240 000 km)
U Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
See Engine Coolant on page 5-28 for what to use.
inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap. An Emission Control Service.
U Inspect engine accessory drive belt. An Emission
Control Service.
0
Change transfer case fluid.
0
Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
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