when driving i feel the truck snatch into gear. It do it more ratic from 1st to

Hello, a proper diagnosis is in order for the performance of your engine and transmission. It could be an internal hydraulic issue, or it could be an electronic one from sensors that help control shift points. Seek the guidance of a trained tech near you. Here are some local suggestions: http://repairpal.com/chevrolet-within-10-miles-of-goldsboro-north-carolina-27530