1998 GMC Safari Owner's Manual - Page 305

Inflation Poorly maintained and improperly used tires are dangerous. 0 Overloading your tires can cause overheating as a result of too much friction. You could havean air-out and a serious accident. See "Loading Your Vehicle" in the Index. 0 Underinflated tires pose the same danger as overloaded tires.The resulting accident could cause serious injury. Check tires all frequently to maintain the recommended pressure. Tire pressure should be checked when your tiresare cold. 0 Overinflated tires are more likelyto be cut, punctured or broken by a sudden impact such as when youhit a pothole. Keep tires at the recommended pressure. 0 Worn, old tires can cause accidents.If your tread is badly worn, if your tires have or been damaged, replace them. -- Tire Pressure The Certificatioflire label, which is on the rear edge of the driver's door, shows the correct inflation pressures for your tires when they're cold. "Cold" means your vehicle has been sitting at least three hours or driven for no more than 1 mile (1.6 km). NOTICE: Don't let anyone tell you underinflation or that overinflation is all right. It's If your tires not. don't have enough (underinflation), you can air get the following: 0 Too much flexing Too much heat Tire overloading 0 Bad wear 0 Bad handling Bad fuel economy. NOTICE: (Continued) --