How To Check; When To Check; Check Tire Pressure System - Pontiac Aztek 2003 Owner's Manual

Notice: Don't let anyone tell you that underinflation
or overinflation is all right. It's not. If your tires
don't have enough air (underinflation), you can get
the following:
•
Too much flexing
•
Too much heat
•
Tire overloading
•
Bad wear
•
Bad handling
•
Bad fuel economy
If your tires have too much air (overinflation),
you can get the following:
•
Unusual wear
•
Bad handling
•
Rough ride
•
Needless damage from road hazards

When to Check

Check your tires once a month or more.
Don't forget your compact spare tire. It should be at
60 psi (420 kPa).

How to Check

Use a good quality pocket-type gage to check tire
pressure. You can't tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they're underinflated.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.

Check Tire Pressure System

Your vehicle may have a check tire pressure system
that can alert you to a large change in the pressure of
one tire. The system won't alert you before you drive
that a tire is low or flat. You must begin driving before
the system will work properly.
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