2009 GMC Envoy Owner's Manual - Page 148

Instrument Panel Brightness Press the knob located next to the exterior lamps knob to extend it. Dome Lamp Override The dome override button is located below the exterior lamps knob. E : Press to turn the dome lamps off. The dome lamps will remain off when a door is open. This overrides the illuminated entry feature unless the Remote Keyless Entry (RKE) transmitter is used to unlock the vehicle. Press the button again to return the lamps to automatic operation. The dome lamps will come on when a door is opened. Turn the knob to adjust the instrument panel lights. Turn the knob all the way up to turn on the interior lamps. Press the knob back into its stored position when you are not using it. Entry Lighting The vehicle has entry lighting. When any door is opened, the dome lamps come on as long as the dome override lamp override button is not pressed in. When all the doors are closed, the lamps stay on for a short period of time and then turn off automatically. If you use the Remote Keyless Entry (RKE) transmitter to unlock the vehicle, the interior lamps come on for a short time whether or not the dome lamp override is on. Dome Lamps The dome lamps come on when a door is opened, unless the dome lamp override button is pressed in. 3-16