1997 GMC Suburban Owner's Manual - Page 116

Interior Lamps Instrument Parrel Intensity Control The instrument panel intensity control is located next to the parkingheadlamp switch. Rotate the thumb wheel up to adjustthe instrument panel lights. Rotate the thumb wheel up to the first notch to return the radio display and gear shift indicator LED display to full intensity when the headlamps or parking lamps are on. To turn on the dome lamps (with the vehicle doors closed) rotate the thumb wheel up to the second notch position. Illuminated Entry Your vehicle is equipped with an illuminated entry feature. When the doors are opened, the dome lamps will come on if the dome lamp button is in the out position. When all doors are closed or the dome lamp button is pressed in, the lamps will stay on for a short period of time and will then go out. 2-42