96 gmc 350 hesitates when you excalleate from a dead stop then runs fine

Thanks for choosing FixYa. It could be a few different things actually. I would start with the basics, such as fuel filter, vacuum leaks, and air filter. I would suggest checking the fuel pressure, just in case it is a fuel injector. It could also be in the ignitions, such as bad plugs, wires, coil pack ect. If you have a check engine light on, try and get the codes. Since it later runs ok, it may just be a simple leak or stopped up filter. Make sure all your hoses are on tight as well.