I've got a 4l60e transmission and it just all the sudden will lose all gears

What is your question?

I had a line get a hole in it drove about 2 miles then fixed it now when I start the truck I have all gears for a few miles maybe less then the trans loses all gears but park and I can pull the ECM-1 fuse under hood and it kills the truck and when I restart the trans is fine for a couple miles then for no reason loses all gears again and last night I was testing it by driving and it seemed like the trans was bogging the engine down to the point of almost firing but I could put in neutral and the engine was fine revved up fine

How long has your 1997 Chevrolet K2500 had this problem?

About 2 weeks