Dash Kit: For Select 1995-2005 Cadillac, Chevrolet Or GMC Vehicles Quick Conversion From Din To 2-Shaft With Snap-In Style Shaft Supports Includes A Recessed Din Opening Side Arm Support System Provides Radio Side Support High-Grade ABS Plastic Wire Harness: Compatible with select Non-Amplified 1988-2002 GM Vehicles . Plugs into car harness at radio. Powersup to 4-Speaker. 21-Pin plug Used for Installing an Aftermarket Receiver to factory plug Allows for installation of aftermarket radio using the existing factory wiring and connectors. No need to cut or splice in factory wiring. Antenna Adapter: Factory Antenna to Aftermarket Radio Adapter Mini "barbless" or "barbed" plug to aftermarket radio For Select 1988-2006 GM Vehicles Please refer to the manufacturer's website for a more precise list of compatible vehicles.