1994 Pontiac Grand Am Owner's Manual - Page 201

Service & Appearance Care Tire Inspection and qotation i'o make ,your tires last longer, have them nspected and rotated at the mileages ecommended in the Maintenance ichedule. See "Scheduled Maintenance jervices" in the Index. 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 2/32 inch (1.6 mm) or lessof tread remaining. You need a new tire i f You can see the indicators at three or more places around the tire. 0 Jse this rotation pattern. 4fter the tires have been rotated, adjust he front and rear inflation pressure as ;hown on the Tire-Loading Information abel. Make certain that all wheel nuts arc xoperly tightened. See "Wheel Nut rorque" in the Index. You can see cord or fabric showing through the tire's rubber.