How do you replace the radio in a 2004 GMC Envoy?

To replace the radio in a 2004 GMC Envoy, start by disconnecting the negative battery terminal to ensure safety. Remove the trim panel around the radio by gently prying it off with a flat tool. Unscrew the mounting screws holding the radio in place, then disconnect the wiring harness and antenna cable. Finally, connect the new radio, secure it with screws, and replace the trim panel before reconnecting the battery.