95 tahoe factory radio swap

i put in a new cd player in the 95 tahoe, now the rear speakers in the doors dont work the front doors and the far rear back overhead work, someone told me that the doors are ampliefied from the factory and i need to hook up the remote turn on, QUESTION IS " To What "

On the 95s the aftermarket plug adaptor has a blue wire only witch is probably labled power antenna will those dont have a power antenna and that lead is the remaote turn on lead for that vehicle. So hook the blue/white from the aftermarket radio to the blue wire from the aftermaket plug adaptor.

the rear door speakers are amplified, the factory amp for them is under the drivers seat. You need to make sure that you have the factory amp turned on so they will play.