1993 Pontiac Sunbird Owner's Manual - Page 177

Service & Appearance Care NOTICE: Ddn't let anyone tell you that underinflation or overinnation is all dght. It's not. If your tires don't have enough air (underinflation) you can get: Too much flexing Too muchheat Tire overloading Bad wear Bad handling Bad fuel economy. If your tires have too much (overinflation), you can get: Unusual wear Bad handling Rough ride Needless damage from road hazards. i , Inflation-Tire Pressure The Tire-Loading Information label which ison therear edge of the driver's door showsthe correct inflation pressures for your tires, when they're cbld. Cold means your vehicle has been sitting for at least three hoursor driven no more than a mile. When to Check Check your tires once month or more. a Don't forget your compact spare tire. It should beat 60 psi (420 kPa). How to Check Use a good quality pocket-type gage to check tire pressure. Simply looking at the tires will not tell you the pressure, especially if you have radial tires which may look properly inflated even if they're underinflated. If your tires have valve caps, be sure to put them back on. They help prevent leaks by keepingout dirt and moisture.