1994 GMC Safari Owner's Manual - Page 266

Inflation - Tire Pressure The Certificationnirelabel which is on the rearedge of the driver's door, shows the correct inflation pressures for your tires, whenthey're cold. "Cold" means your vehicle has been sitting for at least three hours or driven no more than a mile. NOTICE: Don't let anyone tellyou that underinflation or overinflation is all right. It's not. If your tires don't have enoughair (underinflation) you can get: Too much flexing 0 Too much heat Tire overloading Bad wear Bad handling Bad fuel economy. 0 0 If your tires have too much (overinflation), you can get: air 0 Unusual wear Bad handling Rough ride Needless damage from road hazards. 0 0 0 When to Check Check your tires once a month or more. 60 Don't forget your compact sparetire. It should be at psi (420 P a ) . How to Check Use a good quality pcket-type gage to checktire pressure. Simply looking at the tires will not tell youthe pressure, especially if you have radial tires - which may look properlyinflated even if they're underinflated. If your tires have valve caps, be sure to put them back They help prevent on. leaks by keeping out dirt and moisture. 6-48