518tmlayton

Hello everyone, This is my first post after being a lurker for a while. Just bought a 2015 Silverado 1500 with a 5.3 double cab short box with the 18 inch rims and Good Year "off road" tires. Add me to the list of vibrations. It started with around 400 miles or so. I also have some shuddering in 2-3 and 3-4 upshifts as well as the RPMs fluctuate up and down by a few hundred RPMs while at moderate acceleration under a light load. The tach literally jumps up and down and it buck and jerks while it is happening. I haven't gotten it to the dealership yet with the holidays but will be getting it in next week to see where it lands me. I'm thinking it might all be related to the torque converter. I am now at 1200 miles and 2 1/2 weeks of ownership. I will update after the dealership checks it out.