How to remove a Holden VY - VZ factory radio aka Chevrolet Jul 03, 2015This is how to remove a factory radio from a Holden VY - VZ. New video here - https://wwwube/watch?v=jHVuCCZ4_yY The old one got a bit ruined This v.. Installing a Head-Unit Into a VT-VX Commodore Installing a Head-Unit Into a VT-VX Commodore. In this article i will explain how to install an aftermarket head-unit into a VT-VX Commodore. As many will know these Commodores use a "double DIN" factory stereo, the double DIN means its double the size of a standard stereo head-unit (DIN).