I was researching on which wire harness to pick up for my 03 double din aftermaket nav. I came across a couple of different ones listed. Would anybody know the correct one for a double din nav?

Metra 71-7550 - On metra website it says harness into oem radio
Metra 70-7551 - On metra website it says harness into car
Metra 70-7550 - I also found this somewhere else http://www.audio-discounters.com/70-7550.html


Any ideas or advice?

Here's the other stuff I was kicking around for my setup.
Double Din Finisher
AC Controller
DD Nav Cage
PAC SWI-PS steering wheel controller
Metra PN-40-NI10 diversity antenna adaptor
Pioneer D3 unit

 

if you have bose- 70-7551

non bose - 70-7550

that is all

 

I currently have a bose head unit and going to replace it with the Pioneer D3. Looks like I'll be getting the 70-7551. Thanks!