H2nd2none

All if this has been done before I posted. None of it works and the dealer can not duplicate the problem. They say it must be the software and needs reprogramming. Go figure. It is irriating for the radio and the dash to just go dim during daylight. I will eventually go back to the daylight settings but it takes some time. GMC needs to address the problem.

Headlights - set on auto Dimmer switch under lights control - pushed all the way up On radio display screen - under setting the display is set to day mode How can I get the display on the inside to stay in day mode? It keeps going dim or to night mode when I go under bridges or when it starts getting dark. If I have it set to day mode it should stay in day mode. It's not in auto mode but it acts like it is.

Sorry guys I'm not talking about the headlight. My radio display and dash display I have changed the settings to day mode not auto. The inside display on screen and dash keeps going back to night mode. How is this possible and how can I fix it

I have my display mode set to day but as soon as I drive in shade or when it starts getting dark the display goes dim. This is really irritating. I check setting but it shows display is in days mode. I've taken to GM for service but they say it does not change with them. Help! Thanks in advance.