Guys, if he has a 00 SSEi he has a double DIN factory radio. The radio will fit the dash cavity once the rear portion is cut away to allow for the extra needed depth. Now our dash cover has rounded corners that slightly overhang the corners of the radio. Those corners will have to be reshaped/refinished to clear the face of the double DIN unit. American International part no GM-K422 is a set of double DIN sized ISO mount brackets that will attach to the side of the radio'* chassis, and match the shape and location of the factory brackets. Because the 00+ radios are not held in with screws, you'll need to use a speed clip or an OEM style threaded plug to give a screw something to bite into.