A friend of mine works at a dealership He was able to print off radio wiring diagrams. If you happen to know someone who works at a dealership. If not a decent dealership may print them off? Fyi, i don't know if the 2013 is the same as my 2015, but they can be expensive to upgrade. mine has sony system with subwoofer and navigation. I needed a PAC kit and wirung harness. Was 3 or 400 jut for that. Thats to add a amplifier. Still use factory head unit. kenwood makes a drop in H.U but they are over almost 2k and more depending on which one you get ( need maestro and wiring harnessesfor it to work) I've seen some people buying temu type stuff and having luck. but i don't know much about that.
