1993 Pontiac Grand Am Owner's Manual - Page 234

lire inspection and Rotation To make your tires last longer, have the Check your tires once a month more. them inspected and rotated at or mileages recommendedin the MainteDon't forget your compact spare It tire. Index under nance Schedule. See the should be at60 psi (420 kPa). Scheduled MaintenanceSewices . How to Check: Use this rotation pattern. Use a good quality pocket-type gage to After the tires have been rotated, adjust check tire pressure. Simply lookingat the front and rear inflation pressure as the tires will not tell the pressure, you shown on the Tire-Loading Infomation especially if you have radial tireslabel. Make certain thatall wheel nuts which may look properly inflated even are properly tightened. See the Index if they're underinflated. under Wheel Nut Torque. If your tires have valve caps, be to sure put them backon. They help prevent leaks by keeping out dirt and moisture. When to Check: 2 3 3 .