please help! 02 gms sierra reg cab
 

I am new to this forum thing and I would like some help with my truck. I have a 02 short bed reg cab and am looking to installing/fabricating a rear roll down window. I am a gear head and love to tune up motors but, I don't know much about body and interior customizations. Can someone point me in the right direction?

There was a company that made power sliding windows (not down), but that would probably be the easiest way. I think it was CL Lawrance, but I may be wrong - I used to have one on my old Mark III conversion truck.