Chevrolet Equinox Service Manual: Tire and Wheel Inspection
The tires on all new production models have a tireperformance criteria (TPC) rating number molded on the sidewall.The TPC rating will appear as a 4-digit number preceded by theletters TPC-SPEC on the tire wall near the tire size. Areplacement tire should have the same TPC rating.
Tire Wear
| (1) | HardCornering/Underinflation |
| (2) | Incorrect Alignment/Lack ofRotation |
| (3) | Incorrect Alignment/Non-uniformTire |
| (4) | Heavy Acceleration/Overinflation |
| (5) | Wear Indicator |
Inspect the tire and wheel assemblies for the followingconditions:
Unusual wear such as cupping, flat spots, and/or heel-and-toewearThese conditions can cause tire growl, tire howl, slappingnoises, and/or vibrations throughout the vehicle.
Proper inflation to specifications for the vehicleBulges in the sidewallsDo not confuse bulges, which are an abnormal condition, withnormal ply splices which are commonly seen as indentations in thesidewall.
Bent rim flanges
Wheel Alignment and Tire Balance Wheels
The tires and wheels were aligned and balanced at the factory to provide the longesttire life and best overall performance. Adjustments to wheel alignment and tire balancingare not necessary on a regu ...
Tire Pressure Monitor Tires
This vehicle may have a Tire Pressure Monitor System (TPMS).The low tire pressure warning light alerts to a significant loss in pressure of oneof the vehicle's tires. If the warning light comes on, st ...
Other materials:
Torque Steer Description Wheels
A vehicle pulls or leads in one direction during hardacceleration. A vehicle pulls or leads in the other directionduring deceleration.The following factors may cause torque steer to be moreapparent on a particular vehicle:A slightly smaller diameter tire on the right front increasesa right torque le ...