Things You'll Need:
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Step 1
Check your tires when they are cold. That is, the vehicle should have been driven less than 1 mile; it's even better if they have not recently been driven at all. If you find yourself with a flat, and you need to drive to get air, check your pressure before driving. Add the proper amount once you get to the air source. Understand that every increase of 10 degrees in outside air temperature raises the pressure demands within the Avalanche tire by 1 psi.
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Step 2
Remove the screw caps from the valve stems of the tires you are checking. At your regular check, be sure to do all four tires at the same time. Be sure to place the caps in your pocket or in another safe place until you have completed your check.
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Step 3
Locate the small pin in the center of the valve stem.
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Step 4
Press the other end of the gauge firmly and quickly against the valve stem, making sure that the indicator stick is all the way in at the other end of the gauge. If you hear a hissing sound, this means that air is escaping and you need to apply more pressure to the gauge. With practice, you should be able to do this in one quick movement.
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Step 5
Pull off the gauge and check the reading on the indicator stick that will pop out. The last number appearing on the stick is the pressure of the air in your tire. Your Chevy Avalanche should have a tire air pressure level of 28 to 36 psi.
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Step 6
Replace all caps and put your tire gauge away.
