Hey everyone, first of all this is my first post, but I've been reading this forum for quite a while before I signed up. Anyway this is my 96 silverado 5.7, automatic that I've been fixing up little by little. It was in pretty rough shape when I got it. The issue I'm having now is that while cruising or under light acceleration typically above 45mph every once in a while the truck will violently jerk, just once then continue cruising smooth for a few minutes then do it again. At first I thought the Trans might be jumping out of overdrive, but as near as I can tell the tach stays stable when the truck does the violent hiccup. Any ideas on this? It could be the engine randomly cutting out for a split second, but it's just the level of harshness with it that makes me wonder. It shifts and drives normal otherwise. Luckily it isn't a daily driver for me so it hasn't really been too much of an issue. Any ideas?