GMC 2003 Savana - Manual (Page 310)

Temperature - A, B, C
The lemperature grades are A {the highast), 6, and C,
representing thfl lire-'s rg^istancfi te the generation
of heat and its ability to dissipate heal when tested
under controlled conditions on a specified irrdoor
laboratory test wheel. Sustairted high temperalure can
cause the material oF ihe tiro lo dégénérais and
reduce tlfs Hie, and sKcessive temperature can lead to
sudden fire failure. The grade C correspnnds lo a
level of performance which all passenger car Tires must
meet under the Federal Motor Vehicle Safety Standard
No. 109. Grades B and A repnesent higher levels of
performance on the laboratory lesl wheel than the
minimum required by law.
Warning: The temperaluna grade for this lire is
established for a tke that is properly inflated and not
overloaded. Exoessive speed, underinflation, or
excessive loading, ajlher separately or rn comhinalionf
can cause heat buildup and possible lire failure.
Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and beta need
carefully at Ihe factory to give you Ihe longesf trre life
and best overall performance
Scheduled wheel alignment end wheel balancing are
not needed. However, it you notice unusual lire wear or
your vehicle pulling one way or (ha other, the alignment
may need to be reset. IF you notice your vehicle
vibrating when driving on a smooth road, your wheels
may n
0 sd to be rebalanced.