My Suburban has the 6-disc CD with no cassette player. It's been a good unit but really would like to at least have an aux. input for an iPod. Is there a radio from that chassis series that had the input? If not, will a newer chassis-model, or is the radio housing and wiring completely different. Really would like the OEM look and steering wheel button features, and not have to hack warring, etc.

Thank you.