Under dash - right side of steering column - attached to crossbar
Yes
A 2004 Chevy suburban should still be under warranty,unless you have custom lights, you can take it to the dealership and have fixed for free.
No.
headlights
NO , Not from the factory.
Yes
The daytime running lights are connected to the bright lights. It just reduces the power for the daytime runners.
www.fixitnow.com
They are daytime running lights. They are always on so people can always see you. Its a safety thing. Newer trucks have specific daytime running lights.
yes
DRL = daytime running lights
yes , by removing DRL