I did search under every rock, no dice. I have 2002 Bravada with Delco (factory) radio, non-Bose with RDS and OnStar. There are a lot of Aux-in devices out there for all cars and GM, any year up to 2001 and 2004 and up, 2002/2003 modles don't have XM ready radios so I can't use an adapter. I called PIE, Crutchfield and every other guy out there. The only option I have is to replace the HU and lose:
1- Onstar (I don't use it)
2- Ding/Ding warninings (I need them)
3- Steering wheel controls.
4- Back seat audio zone controles (back seat can have its own audio source).
In addition to the price of the unit, I need a $70.00 adapter since I have Databus class II, also, a nother $70.00 to add steering wheel controls, yes for safety, that is $140 + new HU + instalation (my time) - Oh, and it is not that easy to find RDS HU out there, they cost a lot of $$$, yes, the teens in the back seat like to see "HOT 97.1 FM, YOUR HUNKY PUNKY FM STATION" - you get the point.