Just wondering if anyone could link OEM kits for the wire harness 04+ GP's in this thread. I've been looking through a lot of websites and found a couple but still unsure as to the quality. One of them has no reviews I can find and no detailed specs and the other has mixed reviews with word of battery drainage.

Scosche Gmos2b11 : Mobile Video Accessories / Mobile Av (no reviews)
GM Factory Integration Adapter General Motors Class II data bus interfaceRetains ONSTAR system, factory door chime, and Bose system with aftermarket radio at Crutchfield.com (battery problems and popping)

If anyone has done installs to a '08 GXP or even an '07 with Bose and OnStar please throw up any advice you have. It seems most websites list any DDIN units as unuseable in the 08 GXP but this thread seems to tell otherwise.

I am planning on getting a Pioneer DEH-P9800BT for use but if it's true that a double unit fits then I might go with something else.

Looking to keep the steering wheel controls but that is a secondary issue and I've only seen one unit (little information on it) for doing this, any feedback on the device or other kits that do this as well would be great.

Scosche Industries : Car Audio Accessories, iPod Accessories, Bluetooth Wireless Accessories, EFX Hyperformance, Accumat Sound Damping, Soundkase audio backpacks, CD and DVD storage systems

Thanks!