Replacing what you took out. . . who's to say it was right to begin with? That's why I go by the stick.
This is basically my school of thought as well.
Crossed my mind also. But it was running OK prior and I was in line with the GM manual....
For what it's worth (this may just confuse things further) my junkyard 4L80E didn't take as much as the factory service manual said it would after I swapped it into my red truck.
.....in line with the GM manual which appears to be wrong!
Going to pull a litre out of it see what that looks like on the stick.
Thanks all - your help and advice is appreciated and has helped me reach the decision I have.