1998 Pontiac Firebird Owner's Manual - Page 298

Inflation -- Tire Pressure The Tire-Loading Information label, which is on the for driver's door, shows the correct inflation pressures NOTICE: your tires when they're cold. "Cold" means your vehicle Don't let anyonetell you that underinflation or overinflation is all right. It's not. If your tires has been sittingfor at least three hours driven no or don't have enough air (underinflation), can you more than I mile (1.6 km). get the following: If you'll be drivingat high speeds (e.g., speeds of 0 Too much flexing 100 mph (160km/h or higher), where it is legal, set 0 Too much heat the cold inflation pressure the maximum inflation to pressure shown on the tire sidewall, or 38 psi to 0 Tire overloading (265 Wa), whichever is lower. See the example below. 0 Bad wear When you end this high-speed driving, return to the 0 Bad handling cold inflation pressures shown on the Tire-Loading Bad fuel economy. Information label. If your tires have too much air (overinflation), Example: you can get the following: You'll find maximum load and inflation pressure Unusual wear molded on the tire's sidewall, in small letters, near the 0 Bad handling rim flange. It will read something like this: Maximum 0 Rough ride load 690 kg (1521 lbs.) 0 300 kPa (44 psi) Max. Press. 0 Needless damage from road hazards. For this example, would set the inflation pressure you for high-speed driving at psi (265 Wa). 38 6-45