Transmission slipping with traction control ON, but not OFF. on 2004 Chevrolet Suburban 1500

I was experiencing what felt to be transmission slipping when the truck would shift from 1st to 2nd at slow speeds. I had the trany fluid changed, but it no more than regular wear as far as metal. When the problem occurs, the traction control activates... because of that, I tried turning the traction control/stability control off... with that OFF, the problem has completely stopped... any help out there for what may be the problem? THANKS INADVANCE!

Asked by for the 2004 Chevrolet Suburban 1500