I could not find how to install a stock overhead entertainment centre anywhere so I did some research and here goes. My unit came from a 2006 Suburban put into a 2005 Tahoe. It should work for all 2000-2006 GM GMC Tahoe Yukon Suburban SUVs.
I only wanted to get the DVD usable in the rear of the vehicle, I did not connect the unit to the radio so this will not work through the radio speakers, only the wireless headphones.

Connect orange , pin 9, to perm +, pref to its own 15A fuse
Connect black/white , pin 7, ( watch out there are 2 B/W, the other is pin 12) to ground
Connect the light green/black to any data line, I used pin 2 of the data link connector , just to the left of the parking brake release lever, it is purple in colour.

You may need to make a bracket of some sort as the player hooks and screws into the power sunroof frame, which you may not have.

 

Welcome to the forum.

Nice DIY info. Any pics would be nice.

 

I assume that all Tahoe/Sub have a harness floating around up there in the headliner? I'm going to try to install an aftermarket Pyle unit, and just wanted to see if there's power up there?

 

That might be a bad assumption.

Let us know what you find up there.

 

the roof consoles have orange for continuous power and black/white for ground.