I have a older Pionner gm radio in my trans am but of course without mp3 player and all that and ive been looking around and it seems 2 me the only 2 make gm aftermarket recievers it pioneer is this true does anyone know of anyone else or any other models besides the one on crutchfield

There used to be a couple crap brands (Jensen and Sanyo come to mind) that offered them, and I think Alpine offered one for a while, but as far as I know, Pioneer is the only brand still offering them.

However, with a little creativity, it's not hard to make a 1 DIN head unit look good in the dash, and then you open up a whole world of buying options.

Not to mention those larger aftermarket radios are always really expensive!

get an EQ or something to fill up the extra space... (if you care that much) and use a regular deck.