josh remove the radio and get some wire taps then install the 4 wire taps to the rear speaker wires if this is subs and then run all your wires to the amp and you will need to hook up the remote wire to the power antenna wire this will turn the amp on.Here are the colors you will need to find all are in the radio harness.

Power Antenna purple + radio harness
LR Speaker +/- brown / yellow +,- radio harness
RR Speaker +/- dk. blue / lt. blue +,- radio harness

hope this helps