2016 4.3 Chevy Silverado - Idle & V4 shake

[Marc Hershey]

Hello.

 

When at idle (in park only) I have a noticeable shake. I wouldn’t say it’s horrible.. but it’s present.

 

Also, when traveling down the road, once my truck goes into V4 mode, the truck has a VERY noticeable shake.

 

My truck is still under warranty, it only has 51k so what should I do?

 

Take it to a dealer, or is it something simple like spark plugs?

 

No codes are currently present.

 

Thanks!

[WHITESSTOWPIG]

These engines usually have some normal pushrod motor vibrations at idle but when V4 kicks on they will feel different and like an like an actual engine misfire.If what your feeling at idle is anything like when V4 kicks in then you likely have an actual engine misfire possibly the AFM lifer failure.If its only shaking your feeling at idle but the motor itself isnt actual misfiring it could be something simple like faulty motor mounts.I think there was a recall for the motor mounts related to vibrations if thats the case