I have a 2014 Silverado Z71 4x4 CC with the same problem as everyone else. Today (3p.m. central time) I'm Going in to the dealership to have the crankshaft pulley checked out. Not sure if mine has a bigger wobble then what would be considered normal. Also I've had the spark plug boot come off 3 times now on the drivers side of the motor. Same cylinder every time and about 4k miles for it to work off. When it does you hear a sharp ticking noise.
Wondering if the vibration I feel through the steering wheel is caused from the pulley/Damper. I feel the vibration from ruffly 20mph up to 80mph. I haven't gone faster than 80.
This will be my 4th trip in now for this problem.....maybe 5th. Dealership is giving me the same answers as everyone else is getting.