Turn signal

[Poppy041757]

My 2009 GMC Sierra right front turn signal and mirror signal don’t work along with interior lights when I open the doors. 

[MaverickZ71]

Interior lights:

Dome Lamp Override
The dome lamp override button is located next to the
exterior lamps control.
(Dome Off): Press the button in and the dome
lamps remain off when a door is opened. Press the
button again to return it to the extended position so that
the dome lamps come on when a door is opened.

 

Turn signal:

I think I read before that if your turn signal bulb is out, the red arrow light on the mirror on that side won't flash, either.  

 

If those aren't it, you're gonna have to have your dealer hook up a scan tool to see what it says.