I have a 99 Blazer LS 4x4... I am approaching replacement time and now casually shopping the usual suspects MarketPlace and Craig List for the Trans'plant.. there are so many versions of this damn thing it's hard to make a half educated guess or offer not knowing what is/or isn't workable... can some possibly post some pictures of exactly which 4L60e I can shop for?... I am certain it's not a (one)-piece... but very uncertain on the different bell housing bolt patterns... -thanks in advance for some accurate photo references..

 

 

You can use a 4L60E from 1997-2001 the same configuration as the original (2wd or 4wd)
and same engine size. Going to be hard to buy from picture.
Brad