mine came off easy, didnt have to jack it up , it drained about 5L of oil .
the pan fits fairly tight to the valve body so im not sure where you would put a drain plug.

 

Since the Silverado/Sierra uses the 4L60E trans like the Blazer/Jimmy, I was hoping the OEM Silverado pan with a drain plug could be swapped in to the Blazer with no problem. The full size trucks sometimes offer a larger capacity pan as well. That would be nice, but with clearance an issue , that larger capacity feature is probably out. It could be an option for the 2WD version of the Blazer?

 

so what is the best ATF to buy and filter? is there some sort of cleaner to clean the transmission out also?