Cadillac 2006 DTS Owner's Manual page 360

Each tire, including the spare (if provided), should be
checked monthly when cold and inflated to the inflation
pressure recommended by the vehicle manufacturer
on the vehicle placard or tire inflation pressure label.
(If your vehicle has tires of a different size than the size
indicated on the vehicle placard or tire inflation
pressure label, you should determine the proper inflation
pressure for those tires.)
Accordingly, When the low tire pressure telltale
illuminates, you should stop and check your tires as
soon as possible, and inflate them to the proper
pressure. Driving on a significantly under-inflated tire
causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle's handling
and stopping ability.
5-60
As an added safety
feature, your vehicle has
been equipped with a
tire pressure monitoring
system (TPMS) that
illuminates a low tire
pressure telltale when one
or more of your tires is
significantly under-inflated.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver's responsibility to
maintain correct tire pressure, even if under-inflation has
not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
The CHECK TIRE PRESSURE warning message and
low tire pressure light (telltale) will appear at each
ignition cycle until the tires are inflated to the correct
inflation pressure.
The Tire and Loading Information Label shows the size
of your vehicle's original tires and their recommended
cold inflation pressures. See Loading Your Vehicle
on page 4-31, for the location of the tire and loading
information label. Also see Inflation - Tire Pressure
on page 5-56.
Your vehicle's TPMS can alert you about a low tire
pressure condition but it does not replace normal tire
maintenance. See Tire Inspection and Rotation on
page 5-63 and Tires on page 5-49.
Notice: Do not use a tire sealant if your vehicle has
Tire Pressure Monitors. The liquid sealant can
damage the tire pressure monitor sensors.