Installing a subwoofer and and amp need assistance

[bigred90gt]

You can buy line converters to use to splice into the stock amps. They will splice into the signal wires, and ave jacks to plug in your RCA's. I ran my power lead through a gap in the body panels in the engine bay, through the door opening, under the sill plate, then under the interior panels in the back seat. It came out from the interior panels under the seat cushion, and I just ran it around the seat into the truck. You could only see a few inches of the wire when the door was open, but could not see them at all in the interior of the car.