Thanks Guys for the input. MT2500, 97 Blazer 4x4, 4.3, 4L60E, LT235x75x15, Green exterior with gray interior. Ha Ha.
I tore into it this afternoon. What I found was nothing wrong with o-rings or anything, line pushed in all the way, clip was in correct place & seated. So I changed out the fitting again the one in it was new. That took care of the problem. I showed the fitting to a couple of mechanics I knew & they did not see anything wrong. So I'm assuming it was defective.
Thanks Again