I would recomend returning the LC2i and going with the LCQ-1
. The LCQ will allow you multi channel output so you can run mutiple amps.
Additionally, the equalization of the LCQ is very much needed in these trucks. The factory radios are set to pump up the high end to levels that really suck when you upgrade your system. Which is also why I would advise the LCQ even if your amps take line level input.
If you don't have the Alpine system then this might work for you.
1. Identify the speaker outputs at the head unit harness and cut them. If you are using the LC2 then only cut the front. If you are using the LCQ then cut the front and rear.
2. Leave as much wire as possible on the harness side in case you need to reconnect them later.
3. Connect the harness side of the cuts to new wire and run that to wherever your Audio Control is located. Some prefer soldiering, some ue butt connectors, I personally like Posi-Lock connectors.
4. These will be your line level inputs the Audio Control will use.
Power for Audio Controls:
1. Two options, tap into an existing power source like the AUX power in the center console. or, use the power you are running to your amps. Both ways work.
2. Make sure you properly ground the unit. Easiest place it to use the ground your amps are using.
Obviously run the RCAs to the amps.
This should be it.