Pontiac 2002 Firebird - Manual (Page 294)

6-48
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.
Tire Inspection and Rotation
Tires should be rotated every 6,000 to 8,000 miles
(10 000 to 13 000 km). Any time you notice unusual
wear, rotate your tires as soon as possible and check
wheel alignment. Also check for damaged tires or wheels.
See “When It’s Time for New Tires” and “Wheel
Replacement” later in this section for more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The first rotation
is the most important. See “Scheduled Maintenance
Services” in the Index for scheduled rotation intervals.
If you don’t have P245/50ZR16 Goodyear Eagle GS - C
tires or P275/40ZR17 Goodyear Eagle F1 - GS tires,
use the rotation pattern shown above for your tires.