I have a 99 chevy silverado 5.3 that will sometimes fall flat on ots face when taking off. Seems the harder you get on it the worse it gets, until you let off and peddle it a little bit then it will take off. seems to be happening most when I turn say out of a parking lot on to roadway. there are no codes, no check engine light, no idea. I have been kicking around ideas that it could be bad gas, but its been going on now for about 3000 miles. In which time I ran it completely out of fuel. thought maybe its a sensor like o2 or something but figured there would be a code if it was. I even have considered a catalytic converter being plugged or a fuel pump problem but I dont want to go changing a bunch of things and not solve the problem. Any help would be greatly appreciated.