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Ok so I'm getting ready to replace remote oil lines along with oil cooling lines. As I sat underneath the truck, I noticed this new drip. Its between the Bell housing and Engine block. It seems to be mostly coming from passenger side and possibly inside bell housing. Keep in mind, I just degreased & power-washed the entire under-frame. I have not driven the truck anywhere and this drip appeared after sitting for 3 days on ramps. I took pictures of the Drip and also the driver side and passenger side.
Give it another wash, or wipe with brake cleaner.
I've seen residual oil drip like this once it warms up after a thorough wash.
The Blazers is not notorious for oil leaks, other than from fittings.
May want to check out from bottom to top and have a look at all the fittings into the block, cylinder heads and especially valve covers.