1996 GMC Safari Owner's Manual - Page 275

When It'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 1/16 inch (1.6 mm) or' less of tread remaining. 0 The tire. has a bump, bulge or split. The tire has a puncture, cut or other damage that can't be repaired well because of the size orlocation of the damage. Buying New Tires To find out what kind and size of tires you need, look at the Certificatioflire label. The tires installed your vehicle when it was new had on a Tire Performance Criteria Specification(TPC Spec) number on each tire's sidewall. When you get new tires, get ones with that same TPC Specnumber. That way your vehicle will continue tohave tires that are 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 by an "MS" (for mud and snow). If you ever replace your tires with those not having a TPC Spec number, make surethey are thesame size, load range,speed rating and construction type (bias, bias-belted or radial) your original tires. as YOUneed a new tire if any of the following statements are true: You can see the indicators at three or more places around the tire. 0 You can see cord or fabric showing through the tire's rubber. The tread or sidewallis cracked, cut or snagged deep enough to show cord or fabric. 0