The 12 pin if it is small white in color is the radio harness.  You would use the BT PAN CAS to plug into it and wire the other end to your new radio.
The small harness is most likely an option pluge if male would plug into the factory radio as well.  You will not use it for an aftermarket   Read more...

If the unit plugs in the truck and does not turn on, you need to check to make sure you have power supplied to the radio.  The radio needs 2 sources for power.  1 on the red wire which should be switched with key and 2 one for battery supply for settings and clock.  Check for power to these wires.  If power exist check  the radio fuse.  It should be around the power plug for the radio.  If fuse is good and radio still does not work, you would nbeed to return   Read more...

You would use th BT ISO DIN harness and wire it to the Pioneers' harness.  The colors will match.  Once they are wired together you can plug it into the trucks...   Read more...

I believe there is a plug on the back of the radio for just that.  You would need to check with the service center for Pete to see if they know.  If so it would probably be a peko brand from Pana
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Not 100% sure but would expect it to be the BT ISO DIN.  You might want to pull it to be   Read more...