GM Service Manual Online
For 1990-2009 cars only

Object Number: 806779  Size: A2

You can use the dome lamp override button, located below the exterior lamp control, to override the automatic operation of the dome lamps.

To turn the automatic operation of the lamps off, press the button. The dome lamps will remain off while a door is open. To return the lamps to automatic operation, press the button again.

While pressed in, this will override the illuminated entry feature unless you use your keyless entry transmitter to unlock the vehicle.