I have an 07 LS with the 3.4 2wd. My problem is when I am driving down the road, running anywhere from 15 to 2800 rpm and in I guess its 5th gear, and I accelerate slowly my nox starts to jerk and shutter like the trans isnt catching or a few cylinders arent firing. What the Heck? We love this vehicle. I really hate to see anymore issues besides the battery grimlin show up. Please help.