I have a 2012 Chevy Tahoe. The dash backlight is not working during the nights time. The AC and heat control backlights are also not working during the nighttime. The milage and warning sign display is working fine. The dash backlights work in the daylight, just not at night. I changed the switch and the ambient light sensor, but it still is not working correctly. Does anyone know what the heck is going on?