Chevrolet 1998 C/K Full-Size Pickup Owner's Manual page 344

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If your vehicle has dual rear wheels and the load range
and tread design for your front tires is the same as your
rear tires, always
use
one of the correct rotation patterns
shown here when rotating your tires.
U
If your vehicle has dual rear wheels and the load range
or tread design for your front tires is different from your
rear tires, always use the correct rotation pattern shown
here when rotating your tires. The dual tires are rotated
as a pair, and the inside rear tires become the outside
rear tires.
When you install dual wheels, be sure the vent holes in
the inner and outer wheels on each side are lined up.
After the tires have been rotated, adjust the front and
rear inflation pressures 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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