The surveillance button (SURV) is designed to prevent unwanted activation of the exterior and interior lighting.
The button is located on the instrument panel to the right of the exterior lamp knob.
When the surveillance button is pressed, all automatic exterior and interior lighting functions such as the radio display and the transaxle shift indicator (PRNDL) are disabled. The Daytime Running Lamps (DRL), the courtesy lamps and the dome lamp will also be inactive. All lighting functions can still be activated manually if necessary. Press the surveillance button again to reactivate these lighting functions.
Daytime Running Lamps on Impala police sedans sold in Canada are not disabled when the surveillance button is pressed.