I have a bone stock stereo in my 07 LS. Does our factory CD play head unit have RCA AUX outputs in the back? Id like to put 1 12in kicker with a small amp just for some added bass so i didnt want to have to purchase a new head unit b/c i really like mine. Also does anyone know which wire that comes off the head unit I should use to power the remote wire for the amp? Thank you very much.