Marker Lamps; Instrument Panel Brightness; Dome Lamps - GMC T-Series 2007 Owner's Manual

To idle your vehicle with the DRL off, set the
parking brake. The DRL will stay off until
the parking brake is released.
As with any vehicle, you should turn on the
regular headlamp system when needed.

Marker Lamps

If your vehicle is designed for trailer towing, this
button will operate the marker and clearance lamps.
Press the button to turn the lamps on and press it
again to turn them off.
The headlamp band will not operate these lamps.
112
The marker and
clearance lamp button is
located in the instrument
panel. See Instrument
Panel Overview on
page 100.

Instrument Panel Brightness

Turn the knob counterclockwise to brighten the
instrument panel lights or clockwise to dim them.

Dome Lamps

The dome lamp switch can be set to three
different positions: DOOR, OFF, and ON.
When the switch is set to DOOR, the dome
lamp will come on only when the driver's door
is open. If the switch is set in the OFF position,
the dome lamp will not illuminate, even when
the door is opened. The dome lamp will remain
on whether or not the door is open if the switch
is placed in the ON position.
If your vehicle has this
feature, the knob is
located on the lower
right of the instrument
panel.