GMC 2007 Envoy - Manual (Page 209)

Tire Pressure Light
This light will come on
briefly when you turn
the ignition to RUN.
This light will also come on when one or more of
your tires are significantly underinflated.
If your vehicle has a Driver Information
Center (DIC), a CHECK TIRE PRESSURE DIC
message will accompany the light, see DIC
Warnings and Messages on page 222
Stop and check your tires as soon as it is safe to
do so. If underinflated, inflate to the proper
pressure. See Tires on page 439 for more
information.
This light will flash for approximately 70 seconds
and then turn on solid if a problem is detected with
the Tire Pressure Monitor system.
See Tire Pressure Monitor System on page 448
for more information.
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