From what I heard is: GM didn't have a motor that could get the top
back into the well, so they made the guys in the back seat grab it and fold it away nice and cozy. This was a job that didn't sit too well so not many folks wanted a ride in the back seat. So Chevy stuck to making two door convertibles. Now I heard this from a used car salesman and I got out of the showroom as fast as possible.