That would be obvious, but that also makes the instructions pretty poor.
I tried this yesterday. When the daylight sensor detects light the control has no effect on the brightness of the DIC or the center console screen (including the backup camera view). When daylight fades, headlights automatically come on and you can dim the brightness of the DIC and the center console screen (the backup camera view also dims.) This does not adjust the backup camera's sensitivity, only the screen brightness.
It would be nice if, as the manual indicates, the backup screen were adjustable independently. When the dashboard lights are just right, the backup screen is too dark.
Maybe there is a way for the dealer to adjust the backup camera settings within the maintenance/diagnostic settings. I have never read that these settings are accessible by the owner.
This is what it says in the manual about the backup camera screen: "Press MENU to adjust the display brightness while viewing the rear camera display." It doesn't really make much sense, but it's there.
Yes, the instructions do not apply to the Gen II Volt. Maybe the author copied and pasted the text from the Owner's Manual for a different GM vehicle.
I believe the early Gen 1 Volts (2011 & maybe 12) had some sort of adjustment for camera brightness. They had removed it by 2013.
2012 and 2011 have an auto-contrast/brightness in the camera system (which does seem to cope with everything from noonday sun to "reversing light is the brightest thing for a mile and a half" IF given a couple of seconds to do its thing. The console brightness wheel to the left of the steering wheel does roll the brightness of the DISPLAY up and down, but not the image brightness.
