2000+ up you remove the two vents, two screws behind the vents, the hvac ***** and gently pull the trim piece off. 4 screws hold the radio in. If you have the 6 disc changer below the radio, remove the trim around it and two screws hold it in. unplug all connectors going to the radio and wire up you new radio plug to the adapter you bought from store(do not cut wires). If you are swapping out a stock for stock then just plug everything in.