by thrlskr [OP] ?? Feb 26 2012, 1:53am My transmission is on its way out Decided to replace it myself, but have had several issues (frozen bolts, difficulty reaching parts and more metric bolts than anticipated)Details: 2000 Sierra 1500, 5.3 l, ext cab, 4x4Followed the manual and have been able to remove everything except the top two bellhousing bolts.