Cadillac 2008 STS, Owner'S Manual, Page: 405 / 500

Run-Flat Tires (STS-V)
If your vehicle has run-flat tires, there is no spare tire
and no tire changing equipment. Run-flat tires can
operate effectively with no air pressure for a limited
distance and speed. These tires perform so well without
any air pressure that a Tire Pressure Monitor (TPM)
is used to alert you when there is a low tire condition.
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CAUTION:
When the low tire warning light is displayed on
the instrument panel cluster, your vehicle’s
handling capabilities will be reduced during
severe maneuvers. If you drive too fast, you
could lose control of your vehicle. You or
others could be injured. Do not drive over
55 mph (90 km/h) when the low tire warning
light is displayed. Drive cautiously and check
your tire pressures as soon as you can.
See Run-Flat Tires (STS-V) on page 5-65 and Tire
Pressure Monitor System on page 5-68, for additional
information.
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CAUTION:
Special tools and procedures are required to
service a run-flat tire. If these special tools and
procedures are not used you or others could
be injured and your vehicle could be damaged.
Always be sure the proper tools and
procedures, as described in the service
manual, are used.
To order a service manual see Service Publications
Ordering Information on page 7-15.
Tire Sealant and Compressor Kit
Your vehicle has a tire sealant and compressor kit that
is capable of temporarily sealing small punctures in
the tread. There is no jack or spare tire. The kit inflates
the tire with liquid sealant and air. After the tire is
inflated to the recommended inflation pressure, see
Inflation - Tire Pressure on page 5-66 for more
information, the vehicle must be driven for five miles to
distribute the sealant in the tire and seal the puncture.
After driving five miles the tire pressure must be
rechecked and adjusted as needed. See Using the Tire
Sealant and Compressor Kit later in this section.
5-87