I do listen in the car and love quiet music to help with the stress of driving. I used to do all the upgrades myself, but not these days. You are correct about hard to upgrade. Trying to get all the functionality back using wiring harnesses is awful. I had an installer who could not get my backup camera to work. I finally figured it out myself. I had a bed liner sprayed on and they disconnected the tailgate wires and did not reconnect the camera.
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