OK, Bought a 07 with a couple problems today.

[Grady_Wilson]

My 2011 Yukon Denali has no lines in the backup camera, no door courtesy lights, but it does have courtesy lights on the mirrors.

 

[SpareParts]

From what i can tell, it looks like the PO changed the mirrors out for ones without the paddle lights on the mirrors for some reason.
Every part's diagram i look at shows paddle lights. Just seems odd to me.