2004 GMC Envoy Owner's Manual - Page 139

Dome Lamp Override The dome override button is located below the exterior lamps knob. Entry Lighting Your vehicle is equipped with entry lighting. When a door is opened, the dome lamps will come on if the dome override button is in the "out" position. When all the doors are closed, the lamps will stay on for a short period of time and will then turn off automatically. If you use your keyless entry transmitter to unlock the vehicle, the interior lights will come on for a short time whether or not the dome override is on. Exit Lighting To turn the dome lamps off, press the button. The dome lamps will remain off when a door is open. This will override the illuminated entry feature unless you use your keyless entry transmitter to unlock the vehicle. To return the lamps to automatic operation, press the button again. The dome lamps will come on when you open a door. With exit lighting, the interior lamps will come on when you remove the key from the ignition to help you see while exiting the vehicle. With the dome override button in the "out" position, these lights will stay on for a short period of time and then will go out. 3-19