Maximize the performance and durability of your GMC’s tires by monitoring and maintaining correct air pressure. Air is a gas, expanding when heated and contracting when cooled. For most of North America, fall and early winter are especially important times for checking tire pressure—as the ambient temperature falls, tire air pressure goes down.
A good rule of thumb is that for every 10 degrees Fahrenheit temperature change, tire pressure changes about 1 psi—higher as temperatures rise, lower as they fall. Check your GMC Owner's Manual for recommended tire pressure.
Check your vehicle’s tires at least once a month when the tires are cold (let the vehicle sit for at least 3 hours). Look in your GMC Owner's Manual for the recommended tire inflation for your vehicle. Use a quality gauge. Don’t eyeball tires—radial tires can look fine even when they’re underinflated. Be sure to look for objects that have become wedged in the tread—they can work themselves further into the tire and cause air loss. And don’t forget to check the spare!
The Tire Pressure Monitoring System in most newer GMC vehicles makes it easy to tell if your tires are properly inflated. The system’s sensor measures the pressure and temperature within the tire and transmits this data to the tire pressure monitor. If the measured tire pressure is different from standard operating range, a warning indication will signal.
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