2006 GMC Envoy Owner's Manual - Page 418

Inflation - Tire Pressure Tires need the correct amount of air pressure to operate effectively. Notice: Do not let anyone tell you that under-inflation or over-inflation is all right. It is not. If your tires do not have enough air (under-inflation), you can get the following: A Tire and Loading Information label is attached to the vehicle's center pillar (B-pillar), below the driver's door latch. This label shows your vehicle's original equipment tires and the correct inflation pressures for your tires when they are cold. The recommended cold tire inflation pressure, shown on the label, is the minimum amount of air pressure needed to support your vehicle's maximum load carrying capacity. For additional information regarding how much weight your vehicle can carry, and an example of the tire and loading information label, see Loading Your Vehicle on page 4-45. How you load your vehicle affects vehicle handling and ride comfort, never load your vehicle with more weight than it was designed to carry. Too much flexing Too much heat Tire overloading Premature or irregular wear Poor handling Reduced fuel economy When to Check Check your tires once a month or more. Also, check the tire pressure of the spare tire. If your tires have too much air (over-inflation), you can get the following: Unusual wear Poor handling Rough ride Needless damage from road hazards 5-62