Rims And Wheels; Dual Tire Operation - GMC C series 2002 Owner's Manual

Rims and Wheels

Rims and wheels are stamped with a maximum load
and cold inflation rating. Be sure you don't exceed
these limits.

Dual Tire Operation

When the vehicle is new, or whenever a wheel, wheel
bolt or wheel nut is replaced, check the wheel nut torque
and tighten the wheel stud nuts to the specified torque
values at 1,000 miles (1 600 km). Thereafter, tighten
them 1,000 miles (1 600 km) after each time the wheel
is removed.
For proper torque and wheel nut tightening information,
see "Tightening the Wheel Nuts" in the Index.
The outer tire on a dual wheel setup generally wears
faster than the inner tire. Your tires will wear more
evenly and last longer if you rotate the tires periodically.
6-50
If you're going to be doing a lot of driving on
-
high crown roads, you can reduce tire wear by adding
5 psi (35 kPa) to the tire pressure in the outer tires.
Be sure to return to the recommended pressures when no
longer driving under those conditions. See "Tires" and
-
"Inflation Tire Pressure" in the Index for more
information on proper tire inflation.
CAUTION:
If you operate your vehicle with a tire that is
badly underinflated, the tire can overheat. An
overheated tire can lose air suddenly or catch
fire. You or others could be injured. Be sure
all tires (including the spare, if any) are
properly inflated.