How To Check; Inflation - Tire Pressure - GMC T-Series 2007 Owner's Manual

Inflation - Tire Pressure
Tires need the correct amount of air pressure
to operate effectively. The Certification or Tire
Information label shows the correct inflation
pressures for your tires when they are cold. Cold
means your vehicle has been sitting for at least
three hours or driven no more than 1 mile (1.6 km).
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:
•
Too much flexing
•
Too much heat
•
Tire overloading
•
Premature or irregular wear
•
Poor handling
•
Reduced fuel economy
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
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare tire if
your vehicle has one.

How to Check

Use a good quality pocket-type gage to check tire
pressure. You cannot tell if your vehicle's tires are
properly inflated simply by looking at them. Radial
tires may look properly inflated even when they are
underinflated. Check the tire's inflation pressure
when the tires are cold. Cold means your vehicle
has been sitting for at least three hours or driven
no more than 1 mile (1.6 km).
Remove the valve cap from the tire valve stem.
Press the tire gage firmly onto the valve to
get a pressure measurement. If the cold tire
inflation pressure matches the recommended
pressure on the Certification or Tire Information
label, no further adjustment is necessary.
If the inflation pressure is low, add air until you
reach the recommended amount. If you overfill
the tire, release air by pushing on the metal
stem in the center of the tire valve. Re-check
the tire pressure with the tire gage.
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