2006 Chevrolet Tahoe interior lights

Can’t find the interior light switch to check it out. It malfunctions sporadically. Won’t turn lights on sometimes when entering, and won’t shut down radio and turn on lights when stopped sometimes. So I just lock it and walk away.
Where is it and what is the repair.

How to repair a door actuator so the interior lights turn on when the door opens, as well as, the radio turning off when the truck is turned off and the door is opened. 05 GMC truck interior light does not work when door is opened. Radio does not turn off when truck is turned off and door is opened.

There is a push button on the same panel as the headlight switch that will turn on the interior lights. But then this info is in your owners manual.