Trying to figure out my 2017 silverado 1/2 ton with the 5.3. Has been to dealer with no fix. When you get to the bottom of a hill and start to incline around 1500-1800 rpms truck starts to do a slight jerking motion. Dealer said it was torque converter, had one installed and still doing it. Trans fluid and plugs changed still has problem. Any suggestions? To me it feels like a misfire. No lights on dash. Dealer now says that normal. Almost to the point of trading it in for a ford(not really).