Can someone tell me what the first year model (Silverado 2500HD) was that offered a factory radio with an auxillary input (i.e. for an iPod)? I have a 2004 2500HD and I am curious to see if I can swap out the existing factory unit with a factory one with AUX input. I know I can get an aftermarket, but prefer the factory look.

 

Probably 2007

 

I have a 2005 silverado 1500 and i want the same aux port, but my stock radio doesnt have it. Can i swap a newer one with an aux port for my old one or will it not fit/work?