I'm seriously considering installing the double DIN unit. Did a little more research and it will fit but there'* a catch. On the Bonneville it'd be a breeze, but, on the Aurora, the top of the dash bezel is wider than the bottom. So, the dash bezel will overlap part of the face it appears. (I think, but I'm not positive yet.) The installation kit I have in my dash now, which has the pocket below my cd player, is 4" tall from the top of the bezel, to the bottom of the storage pocket. the width is 7". The width of the pioneer cd player'* faceplate at its widest point is 6.6" and its width is 3.8". This means it'* slightly smaller than the immediate trim around my current cd player with its installation kit.
you can see in this picture the slight overlap. But, the pioneer double din radio has a curved bottom too so I really do not know if it'll just be a tight fit, or if it won't fit throught he dash opening at all. I am positive that it'* possible to put the double din in there pretty easily, I just don't want to cut anything if possible. The depth of the unit is 6.4".. slightly more shallow than my current DIN unit actually so depth should not be an issue! On the Bonneville the 4200MP should fit perfectly into the dash.. on the Aurora, it'* a tossup, I'm nto sure yet. What do you guys think?