Purchased the truck with only an AM/FM radio. I installed an after market Pioneer AVH-1550 NEX stereo. The stereo sounded good with stock speakers but then starting hearing scratchy speaker syndrome . Went to replace the door speakers with pioneer speakers. The truck has 6X9s in the front doors and 6X5s in the rear. When I went to remove the rear door panels I noticed that there were NO speakers and NO speaker wires? Is there wires within the rear door wiring harness that I can splice into? Or do I have bring wires back from the deck?

 

Are both doors the same?
Did you check inside the door for the wiring harness?
I would have to recommend going to the dealer and bringing this to there attention.