Security Light; High-Beam On Light; Front Fog Lamp Light; Lamps On Reminder - GMC 2015 Sierra Denali Owner's Manual

5-26 Instruments and Controls
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank
is low on fuel. The light turns off
when fuel is added. If it does not,
have the vehicle serviced.

Security Light

The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle
serviced by your dealer. If the
system is working normally, the
indicator light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. See Immobilizer Operation
on page 2-13.

High-Beam On Light

This light comes on when the
high-beam headlamps are in use.
See Headlamp High/Low-Beam
Changer on page 6-2.

Front Fog Lamp Light

For vehicles with fog lamps, this
light comes on when the fog lamps
are on.
The light goes out when the fog
lamps are turned off. See Fog
Lamps on page 6-5 for more
information.

Lamps On Reminder

This light comes on when the
exterior lamps are in use. See
Exterior Lamp Controls on page 6-1.