Looking to add the Pioneer avic-d1 unit to my 06 GT with a shaker 500 system. I'm looking for the harness and I've seen several places that talk about premium sound harness for the car is well. Can anybody tell me if this is just for the shaker 1000 system or if I need this harness for the shaker 500 as well? Additionally, would anyone happen to have part numbers for these harnesses? Thanks!