Option 1: The radio amplifier might be located behind the right rear cargo panel. Remove the rear cargo panel to access it.
Option 2: Or it could be located inside the center console. To locate it in the center console, remove the shifter knob. Remove the center console box. Disconnect the shifter cable from the shifter console. Disconnect the shift lock solenoid connector. Remove the six bolts or brackets that secure the center console to the dashboard to reveal the radio amplifier.