1994 Chevrolet Suburban Owner's Manual - Page 308

You can operatesome vehicles at reduced inflation pressures only when you'll be carryingreduced loads. On those vehicles, the minimum cold inflation pressures for a typical reduced load are printed on the "Improved Ride Tire Pressure" label located on the driver's door. Weigh the vehicleto find the load on each tire and see thelabel for theminimum cold inflation pressures forthat load. Don't let anyone tell youthat underinflation or overinflation is all right. It's not. Ifyour tires don't have enough air (underinflation) you can get: Too much flexing Too much heat Tire overloading Bad wear Bad handling Bad fuel economy. If your tires have too much air (overinflation), you can get: 0 Unusual wear Bad handling Rough ride Needless damage from road hazards. When to Check Check your tires oncemonth a or more. Also, check thetire pressure of the spare tire. How to Check Use a goodquality 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 properlyinflated even if they're underinflated. If your tires have valve caps, be sureto put them back on. They help prevent leaks by keeping out dirt and moisture.