The GM Spec area is undergoing a massive amount of maintenance. While it is unforseeable that pictures will come back (they have been gone for some time even on the old site), we are working diligently on getting the steps and wording back up to snuff.
If you are looking for a particular spec that has not been fixed yet, please PM Chevy1925 and he will get to it as fast as he can, if not immediately.