Chevrolet 1994 Astro Passenger Owner's Manual page 267

Tire Inspection and Rotation
To
make your tires last longer, have them inspected and rotated at the
mileages recommended in the Maintenance Schedule. See "Scheduled
Maintenance Services" in the Index.
Use this rotation
pattern. Do not
include compact spare
tire in rotation.
If your vehicle has front tires with different load ratings or tread designs
(such as all season vs. on/off road) than the rear tires, don't rotate your tires
front to rear.
After the tires have been rotated, adjust the front and rear inflation pressure
as shown on the CertificationEire label. Make certain that all wheel nuts are
properly tightened. See "Wheel Nut Torque" in the Index.
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