I scored a pair of these on ebay. Seller said they came from a 2002 Chevy Silverado but I think these seats are the same throughout the Chevy/GMC truck/SUV range. I went with these due to the shoulder belt being included in the seat.
They have the full package of power adjustment options and hopefully heaters also but I don't know for sure on the heaters yet. Color is called "shale" and depending on the light looks everything from light beige to medium gray.
Here's a photo of the wiring connector for the passenger seat. I'm guessing the main power and ground are the big orange and black wires. I'm hoping that the other slightly smaller orange and blue/black wires power the seat heaters. Have any of you guys worked with these seats? I'll ask around in the "interiors" forum also.
Matt Crawley