1995 GMC Yukon Owner's Manual - Page 337

Inflation - Tire Pressure The Certification/Tire label which is on the rear edge of the driver's door, or on the incomplete vehicle document in the cab, shows the correct inflation pressures for your tires, when they're cold. "Cold" means your vehicle has been sitting for at least three hours or driven no more than a mile. You can operate some vehicles at reduced inflation pressures only when you'll be carrying reduced 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 vehicle to find the load on each tire and see the label for the minimum cold inflation pressures for that load. 6-55