Dome light issues-2008 Tahoe LTZ

[olddog211]

My dome lights do not come on. I replaced the light switch module, and the dash lights dim with the dimmer, pushed the override switch, still no dome lights. they don't operate when a door is opened, either. I'm suspecting a fuse or (hopefully not) a BCM problem. Is there a fuse for just the overhead lights? if not, what's the best way to check the BCM?