2001 Tahoe Interior lights

Recently have a problem when opening the driver or the passenger door, the interior lights and door mirror lights will not come on.If I push the overide button on the dash the interior lights will then come on. Any ideas as to where to start looking?

Do they work with the rear doors and the hatch?

No with the cargo door up they do not, only when I push the overide button..

Found the problem, was with the overide button. Apparently I have a mental problem pushing it in and out.Never really was a problem...Thanks for the input though....