Where are you going to put your amp? If you're looking for a sub amp going in the trunk I would pull the converters off the wires going to the factory amp that is already in the trunk. In which case you'd want to use pins 4,12 and 5,13 off amplifier connector X3.
'01 Pewter Corvette Convertible 6spd - Traded in on...
'10 CGM SS RS Ordered- DELIVERED! - Traded in on...
'06 Blk Crystal Pearl Magnum SRT-8
At least now my car won't be sitting in the garage every time the family goes somewhere. 3200 miles driven in 16 months was just pathetic.