Quote Originally Posted by EAD15 View Post
Replace the upstream O2 sensor. My 09 did the bucking thing and that was what fixed it.

Not sure about the throttle response problem
I'll look into it, it seems like that sensor may be pricey? I also realized today while driving it will buck really at any rpm if you press the gas pedal at the right spot. I had it bucking at 2500 rpm in 3rd today, so that's definitely not from lugging the engine. Thanks for the help though!