I just bought a Alpine INA W900BT and need some advice on harness kits and mounting kits. What harness kit do you guys recommend Pac or Gmos? I was reading something about reprogramming the BCM or PCM on PACs website when installing the Pac os2 bose, what is that about? Here is what I want to do and have. Its a 06 SSS with OnStar, Bose and steering wheel controls. I am just going to be installing a HU and nothing else. I dont use Onstar and want to keep my Bose system. I know I have to buy the Pac TR7 for video bypass and the Pac swi jack for steering controls and the Pac cm1 for warning chimes. Now what do you guys recommend Pac or Gmos and with one (part #). Also what mounting kit is good (part#).

 

What did you end up using?... Im about to put in a aftermarket deck and want to retain my onstar, steering control, and bose amplification!!