First time here, hopefully this is helpful.
I have a 2005 Pontiac Bonneville SE V6. When I press the accelerator to take off, it jerks. Its like a kick. When I'm driving at a constant speed, whether around town or highway, it jerks when its shifting gears. My Check Engine light goes on and off. I have had the fuel filter, front mount, and transmission filter replaced. I was told that there are a total of 4 mounts on the car. I want to get all of the mounts replaced. Does anyone have any insight as to what may be going on? I would like to have an idea before I take the car to a diagnostics specialist.