GMC 2003 C4C042, Owner'S Manual, Page: 320 / 386

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Wheel Replacement
Replace any wheel that is bent, cracked or badly rusted.
If wheel nuts keep coming loose, replace the wheel. If
the wheel leaks air, replace it.
Your dealer will know the kind of wheel you need.
CAUTION:
A leaking wheel could fail without warning. A
wheel designed for tubeless tires could be leaking
because it is damaged. Don’t use an inner tube or
some other thing to try to stop the leaking. Get a
new wheel of the proper type.
CAUTION:
Without the correct wheel, you may not be able
to stop properly, and you could have other
problems like a tire air
-
out. You could have a
collision. If you don’t go to your dealer to get a
new wheel, be sure you get the correct one. Each
new wheel should match the original wheel in
load
-
carrying capacity, inflation pressure
capacity, diameter, width, offset and mounting
configuration.
Using wheels and tires with higher load
-
carrying limits
than the original wheels and tires doesn’t change the
GAWR or the GVWR of your vehicle.