Pac onstar interface?

I think I've Decided to swap my factory nav for the Pioneer Avic-Z1 but before I make the swap I would like to know if the Pac-Audio OS-2Bose Pac OS-2Bose will work the onstar just like it does now. Now I can press the button on my steering wheel and it will come on "onstar ready" I can say dail and it will ask number please, I give the number and it will dial will this still work the same way. I use that phone daily and have to retan that feature. Thanks for the help.Black 04 Cadillac Escalade EXT- 13 INCH suspension LIFT,37"nitto mud grapplers,22"MC2 Cadillac wheels, 05 touch screen Nav system, backup cam, Headrest and visor monitors and video input on nav system

Please Help...Black 04 Cadillac Escalade EXT- 13 INCH suspension LIFT,37"nitto mud grapplers,22"MC2 Cadillac wheels, 05 touch screen Nav system, backup cam, Headrest and visor monitors and video input on nav system

Sorry Man, I dont know about that one. I know the peripherial piece, model number GMAH24 and GMAH24B will do what you ask. One of those modules is the standard onstar/databus interface and the other is the onstar/databus/bose interface. Buy which ever one fits your needs. Sorry I couldnt be more helpdouble-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer