Hey guys, I started installing a double din radio to my 2003 str. Everything seemed fairly simple, just connect the colors but now I don't get any sound through my speakers, is there something I missed?

 

If you mean you removed a factory premium alpine unit with the rear mounted amp to fit a double din unit .
Then you will need to swap all the door speaker plug over to the non premium speaker plugs in the doors .
This will render your factory subs inactive Also .