1994 Chevrolet Lumina Owner's Manual - Page 190

Service & Appearance Care Tire Inspection and Rotation (CONT) 0 The tire has a puncture, cut, or other damage that can't be repaired well because of the size or locationof the damage. Buying New Tires TREAD WEAR INDICATORS To find out what kind and sizeof tires you need, look at the Tire-Loading Information label. The tires installed on your vehicle when it was new had a Tire Performance Criteria Specification (TPC Spec) number on each tire's sidewall. When you get new tires, get ones with that same TPC Spec number. That way, your vehicle will continue to have tires thatare designed to give proper endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. If your tires have an all-season tread design, the TPC number will be followed a by "MS" (for mud and snow). If you ever replace your tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires. When lt's Time for New Tires One way to tell when it's time for new tires is to check the treadwear indicators, which will appear when your tires have only 2/32 inch (1.6 mm) or less of tread remaining. You need a new tire i f You can see the indicators at three or more places around the tire. You can see cord or fabric showing through the tire's rubber. 0 The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric.