GMC Defense 2006 Owner's Manual Supplement page 79

The gage display has an
energy saving feature that
turns lights on to full
intensity or active stage
only when required to
display alert conditions or
program the unit. The gage
automatically switches to
low power stage when no
control activity is detected.
The respective tire icon is filled in as soon as data from
its transmitter is received. The windshield/louver is shown
for any towing vehicle transmitter. After data from all
transmitters is received the display will be in the state
shown or normal mode until an alert or warning condition
is detected.
Data from a towed vehicle
or trailer (if equipped with
sensors) is indicated by
tire icons with no
windshield/louver icon.
5-36
The system will alternate
views between the towing
and towed vehicle when
operating with this
configuration.
Checking Tire Conditions
1. Press the TIRE button
2. Press the MODE button
to scroll through the
tires.
to scroll through the
pressure, temperature,
and pressure deviation
readings for a selected
tire.