How do you install aftermarket deck in Mitsubishi Diamante?

To install an aftermarket deck in a Mitsubishi Diamante, first, disconnect the negative battery terminal to ensure safety. Remove the dashboard trim surrounding the factory stereo using a trim removal tool, then unscrew and pull out the old stereo. Connect the aftermarket deck using a wiring harness adapter specific to your vehicle, ensuring all connections are secure. Finally, test the new stereo before reassembling the dashboard trim.