Chevrolet 1998 Lumina Owner's Manual page 278

Inflation
--
Tire Pressure
The Tire-Loading Information label, which is on the
inside of the trunk lid shows the correct inflation
pressures for your tires when they're cold. "Cold"
means your vehicle has been sitting for at least three
hours or driven no more than 1 mile (1.6
km).
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:
0
Too much flexing
0
Too much heat
0
Tire overloading
Bad wear
0
Bad handling
0
Bad fuel economy.
NOTICE: (Continued)
~ ~~~
NOTICE: (Continued)
If your tires have too much air (overinflation),
you can get the following:
0
Unusual wear
0
Bad handling
0
Rough ride
0
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 Wa).
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.
6-40
I _