GMC 2008 Acadia - Manual (Page 159)

Instrument Panel Brightness
D
(Instrument Panel Brightness): The knob with
this symbol on it is located next to the exterior lamps
control. Push the knob in all the way until it extends
out and then turn the knob clockwise to brighten
or counterclockwise to dim the lights. Push the knob
back in when finished.
Courtesy Lamps
When a door is opened, the courtesy lamps automatically
come on. They make it easy for you to enter and leave
your vehicle. You can also manually turn these lamps on
by fully turning the instrument panel brightness control
clockwise.
The reading lamps, located on the headliner above the
rearview mirror, can be turned on or off independent
of the automatic courtesy lamps, when the doors
are closed.
Dome Lamps
The dome lamps automatically come on when a door
is opened, unless the dome lamp override button
is pressed in.
The lamps can also be turned on and off by turning
the instrument panel brightness control clockwise to
the farthest position.
Dome Lamp Override
The dome lamp override button is located next to the
exterior lamps control.
The dome lamp override is used to set the dome lamps
to remain off or come on automatically when a door
is opened.
E
(Dome Lamp Override): Press the button in and
the dome lamps remain off when a door is opened.
Press the button again to return it to the extended
position so that the dome lamps come on when a
door is opened.
Entry Lighting
Your vehicle may have courtesy lamps that will come
on and stay on for a set time whenever the unlock
symbol is pressed on the Remote Keyless Entry (RKE)
Transmitter, if the vehicle has one.
If a door is opened, the lamps stay on while it is open
and then turn off automatically about 25 seconds
after the door is closed. If the unlock symbol is pressed
and you do not open a door, the lamps turn off after
about 20 seconds.
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