In a message dated 9/27/2009 11:32:36 A.M. Eastern Daylight Time, strunkhill1 at comcast.net writes: Side loading doors 49.0 X 53.5 in Rear Doors 36.0 x 44.6. Which should make the diagonal of the rear doors approximately 57 in. if my math is correct. It would if GM didn't build it with a tapering rear opening. It gets narrower. Bob