Cadillac 2012 CTS-V Owner's Manual page 398

This could be an early indicator that
the air pressure is getting low and
needs to be inflated to the proper
pressure.
The Tire and Loading Information
label shows the size of the original
equipment tires and the correct
inflation pressure for the tires when
they are cold. See
, for an example
of the Tire and Loading Information
label and its location. Also see
The TPMS can warn about a
low tire pressure condition but it
does not replace normal tire
maintenance. See
,
and
.
Factory-installed Tire Inflator Kits
. use a GM approved liquid tire
sealant. Using non-approved tire
sealants could damage the TPMS
sensors. See
for information regarding the inflator
kit materials and instructions.
The TPMS will not function
properly if one or more of the TPMS
sensors are missing or inoperable.
When the system detects a
malfunction, the low tire warning
light flashes for about one minute
and then stays on for the
remainder of the ignition cycle.
A DIC warning message also
displays. The malfunction light
and DIC warning message come on
at each ignition cycle until the
problem is corrected. Some of the
conditions that can cause these to
come on are:
One of the road tires has been
replaced with the spare tire,
if the vehicle has one. The spare
tire does not have a TPMS
sensor. The malfunction light
and the DIC message should go