How do you remove the stock CD head unit on a 2003 Mitsubishi Lancer LS?

There are two screws located behind the temperature knob and the vent knob located below the stereo. To get to these screws you have to pull out on these two knobs and then remove the screws with a Phillips screw driver. Once they are removed the grey trim around the stereo and ac/ heater unit should come right off. remove the trim and locate the screws on each side of the stereo. Remove these screws and slide the stereo out of its compartment, being careful not to damage the wiring harnesses and the antenna cable. Remove the wiring harness by pressing in on the quick release tabs on the sides of the plastic connector and gently wiggle the connector from side to side while pulling out away from the stereo. Then if not already disconnected, pull the antenna wire out of the slot. Your stereo should be completely disconnected and you will have to buya wiring harness adapter for the '03 Lancer to properly install an aftermarket stereo. You can usually find these adapters at any car audio store or electronics store. You are now ready to install your new stereo.