I have a 1999 blazer 4wd, 4.3 v6 engine, Automatic Transmission 4L60E. My problem is I was driving down the road and all the sudden the transmission stop pulling like it was in nuetral, when i put it in "D" or "3RD gear position theres nothing, if i put it in low or second and start out and shift it through all the gears manually all gears are pulling fine, I checked all fuses, checked wiring going to transmission, Nothing seems to be unhooked. Any ideas on how to fix this? Thank you!