ok i have 01 with 2k and sometimes when my truck shifts from first to second it feels like it slips kinda hesitates almost like its jumping back and forth. i just noticed it like 500 miles ago wtf is going on???

 

I think you are feeling the torque converter locking up. Does it feel like it allmost shifts twice?

If so it is normal, but feels weird

 

Ditto, my 00' does it too. I is more noticable since I put the chip in it.

 

This may not be what you want to hear.But get a mild chip to help with the shifts, you don't have to get radical, just get one that lock up your converter when it shifts.You'll fell much happier with it and you'll be pleased how the truck responds..
Good Luck
Jerry