CAPRICE1967

HI ALL, NEW TO SITE.
I HAVE A 07 AV Z71 19K MILES GOT USED. TRUCK WAS EQUIPED WITH BOSE RSA 6 DISC. I PURCHASED A NAV/DVD/CD RADIO AND INSTALLED A LOC PIC. I ALSO GOT THE RSE FLIP DOWN SCREEN. I DO HAVE SCHEMATICS AND I ORDERED AND GOT THE UPPER ROOF WIRE HARNESS TO PLUG INTO THE DVD/ INF RED UNIT. WHAT I NEED NOW IS THE "C3" PLASTIC PLUG AND THE PINS FOR THE PLUG SO I CAN MAKE THE REST OF THE HOOKUP. THIS "C3" PLUG WOULD BE THE ONE ON THE BACK OF THE RADIO. I ALSO LOOKED AT MY RSA UNIT AND IT LOOKS LIKE I NEED JUST THE PINS FOR THE "C1" CONECTOR ON THAT SO I CAN ADD THE INF RED COMM WIRES.
CAN ANYONE HELP WITH WERE I CAN GET THE PLUGS/PINS. IF I HAVE TO GET FROM "GM" DO YOU HAVE PART NUMBERS. I LIVE OUT AWAY FROM TOWN AND MY LOCAL DEALERS DON'T LIKE TO HELP. THEY SAY CANT BE DONE AND YOUR VIN DIDN'T COME WITH IT.
ALSO HOW DOES THE CENTER CONSOLE COME APART TO GET WIRES DOWN INSIDE LIKE FACTORY?
THANKS,
PETE