Vibration/shuddering at 50+mph - 2013 Tahoe

[kkwbl]

I have read other threads about shuttering or vibrations at certain speeds which some say may be associated with the engine needing to shift to a higher gear. Here is my situation. I have a 2013 Tahoe LT with 30,000 miles and I really only notice this vibration/feedback when I am at around 50+mph only when I have my foot on the gas. When I let off the gas it seems to go away. I am not strictly accelerating when this happens...I just have my foot on the gas while in normal commuter traffic. Seems weird I plan on bringing it in to the dealer in the next 30-days or so but thought I would check if anyone else has this problem.

 

[markshop]

I have read other threads about shuttering or vibrations at certain speeds which some say may be associated with the engine needing to shift to a higher gear. Here is my situation. I have a 2013 Tahoe LT with 30,000 miles and I really only notice this vibration/feedback when I am at around 50+mph only when I have my foot on the gas. When I let off the gas it seems to go away. I am not strictly accelerating when this happens...I just have my foot on the gas while in normal commuter traffic. Seems weird I plan on bringing it in to the dealer in the next 30-days or so but thought I would check if anyone else has this problem.

sounds like rear driveshaft universal joint.

 

[CrashTestDummy]

You sure it's not just AFM mode you're feeling? At certain speeds the AFM mode is more notable than others in our '10. When you feel the vibration, if you slowly mash the accelerator down, it'll shudder a little more, then go into V8 mode and run smoother. If you start to mash the accelerator down (slowly), and the shuddering continues, you may indeed have some failure that needs further investigation.