GMC 2010 Sierra 1500 Crew Cab Owner's Manual page 271

The light goes out when the fog lamps are turned off.
See
For information regarding
this light and the vehicle's
security system, see
.
The fog lamp light comes
on when the fog lamps
are in use.
for more information.
The light goes out when the cruise control is turned off.
See
See
for more information.
The cruise control light
comes on whenever the
cruise control is set.
for more information.
This light comes on when
the high-beam headlamps
are in use.
4-47