Need Help with some GM code #s

[Steve Cornell]

I have a new Rear Seat Entertainment system (DVD \ 7" wide screen) for a GM crew cab and am in the process of figuring out the wiring....

I spent some time at the dealers computer yesterday downloading wiring schematics and connector views and now need a bit of information on exactly what some of these codes are.....

I know that.......
UE1 = Onstar
UC6 = AM\FM with 6 disc and Bose
UB1 = AM\FM with CD, Cassette, and Bose
U42 = DVD Rear Seat Entertainment
UK3 = Steering wheel controls
U2K = XM Radio

BUT.. Here are the codes I'm trying to figure out
UQ3 = ?
UQ5 = ?
UQ7 = ?
U1S = ?
U2L = ?
Y91 = ?
one of these is Rear Seat Audio controls, Y91 I'm thinking ?
any help would be greatly appreciated :D

I ordered the proper wiring harness, however it is a COMPLETE wiring harness and includes EVERYTHING for the entire audio \ video \ onstar system, I am attempting to dissect the harness and use only the DVD Entertainment Center to Radio harness, I was told by Delphi at CES 2 weeks ago that it is just plug and play with the right harness.

I currently have a 7" monitor and 6 disc DVD changer installed in my truck so unless the factory system is MUCH better I plan to sell it once I get it figured out.

Thanks,
Steve

[Penngrovian]

I think UQ3 is ENHANCED SPEAKER SYSTEM and Y91 is MERCHANDISE PACKAGE LUXERY EDITION.

This is '01 and '02 RPO code info and could be suspect.

This is all I have.