GMC 2003 Envoy - Manual (Page 352)

Inflation -- Tire Pressure
The CertificahDnrriiie label, which is on the dh^/er’s dMf
edge, above ihe dooi latch, shows ihe correct jnflatk>n
pressures tor ycor tires when they’re cold. "Cdd"' meoo$
yoLif vehide has been sitting fpr at least three hoers
or driven no more than t mile (1.6 km).
yvoficer Don’t let anyone let I you that underinflation
or overinflation is all right. It's not. If your tires
don't have enough air funder!nflation), you esn get
the following:
• Too much flexing
• Too miiCh heat
• Tire overloading
*
Bad wear
Bad handlIrFg
Bad fuel economy
It your tires have too much air (ova ri of lotion)^
you can get the following:
• Unusual wear
• Bad handling
• Rough ride
• Meedless damage from road hazards
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare lire.
How to Check
Use a good quality pockel-type gage to check tire
pressura, You can’t teif if your tires are properly inflaled
simply by looking al them. Radial tires may look
properly intlaiecl even when they’re undehnltated.
Be sure to pul the valve caps b&ck on )he valve stems.
They help prevent leaks by keeping
ou\ dirl and
meisturo.
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