Tire and Wheel Inspection. Chevrolet Express

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Express - AWD 🢒 General Information 🢒 Vibration Diagnosis and Correction 🢒 Tire and Wheel Inspection

The tires on all new production models have a tire performance criteria (TPC) rating number molded on the sidewall. The TPC rating will appear as a 4-digit number preceded by the letters TPC SPEC on the tire wall near the tire size. A replacement tire should have the same TPC rating.

Tire Wear


(1)	Hard Cornering/Underinflation
(2)	Incorrect Alignment/Lack of Rotation
(3)	Incorrect Alignment/Non-uniform Tire
(4)	Heavy Acceleration/Over inflation
(5)	Wear Indicator

Inspect the tire and wheel assemblies for the following conditions:

•	Unusual wear such as cupping, flat spots, and/or heel-and-toe wear

These conditions can cause tire growl, tire howl, slapping noises, and/or vibrations throughout the vehicle.

•	Proper inflation to specifications for the vehicle

•	Bulges in the sidewalls

Do not confuse bulges, which are an abnormal condition, with normal ply splices which are commonly seen as indentations in the sidewall.

•	Bent rim flanges