fuse 14 - GM
fuse 28 - headlight washer
fuse 40 - wiper relay
fuse 41 - rain sensor
fuse 81 - rear wiper


fuse 41 is the only fuse that talks to wiper system and to GM... GM may have some issues with the wipers and as a result the interior lights do not operate as initially designed...

test those fuses, lets see what happens...