Dimming Control
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Display dimming for the driver information center (DIC) follows the radio dimming characteristics. Upon activation of the park lamps, the display steps from maximum brightness to dim. While in the dim mode, further dimming is controlled by the pulse width modulation (PWM) Dimming Signal of the instrument panel (I/P) dimming control. The display goes blank upon lowest dimming request of the dimming control.