When To Check; Tire Inspection And Rotation - Oldsmobile 2004 Silhouette Owner's Manual

When to Check

Check your tires once a month or more.
Also, check the tire pressure of the 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.
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 is low,
add air until you reach the recommended pressure
on the Certification/Tire label or the Tire and Loading
Information label.
If you overfill the tire, release air by pushing on the
metal stem in the center of the tire valve. Recheck the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and moisture.
5-68

Tire Inspection and Rotation

Tires should be rotated every 5,000 to 8,000 miles
(8 000 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 Is Time
for New Tires on page 5-70 and Wheel Replacement
on page 5-73 for more information.
Make sure the spare tire is stored securely. Push, pull
and then try to rotate or turn the tire. If the tire moves,
use the folding wrench to tighten the cable. See "Storing
the Spare Tire and Tools" under Changing a Flat Tire on
page 5-76 .
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
on page 6-4 .