New 2017 Silverado- Vibration (different, I promise)

[DirtyDenim]

Hi all-

 

New to the forum, have been lurking a long time. I've read all the posts around vibration and GM Shake and haven't really seen anything that matches up 100% with what I'm experiencing. Thought you might have some ideas? Here are the facts:

 

Truck is Double cab, 6 1/2 bed, 8 cylinder, LT with 3.42. Adjustable pedals, telescoping wheel.

 

I feel a fine vibration in the steering wheel and pedals consistently from about 20mph to 80mph. Not a shake, but more like a gentle, uncomfortable buzz.

 

• Vibration does not correlate to accelerating or braking- I can put the truck in neutral and it remains the same
• Wheels were balanced, no change. Road force balanced, no change. Swapped front to back, no change.
• Got new all terrain tires yesterday. Overall i can feel the road more here and there (as expected), but the vibration has not changed characteristics. It's almost a separate feeling if that makes sense.
• New tires eliminated the death shake that my console had between 70-75mph- water bottle was going crazy.. weird, huh?

 

Other weird things that may be related-

• On my previous F150 when I removed the air dam, I got similar symptoms- wonder if the vibe is aerodynamics- related?
• One of my tires (cant remember if the old set did this) driver front- will jump in psi more than the rest while driving. If I set to 35 cold all around, the back tires and front passenger go up to 37-38 while driving. Front driver jumps up to 41?

 

Appreciate any thoughts/speculation on what to try or check next.

[sdeeter19555]

The tire pressure is probably a TPMS sensor slightly off in calibration. Short that, if it just started on these tires, then I might suspect a bad tire.

 

As for you vibration, if it matches speed, I'd be looking at anything that spins: ujoints, driveshaft out of balance, axle shaft issue, etc...sounds like a ujoint to me.

 

Sent from my SM-T350 using Tapatalk

[Severado]

The constant vibration is from the engine. Happened to my 2015, same configuration as yours. They put shims on the motor mounts. They should have replaced them, but cheap is as cheap does. The death shake feeling fixed is temporary. Don't mod anything for at least 20k miles. The steal-ership will turn you away real fast over damn near anything.

[allenwhite88]

The constant vibration is from the engine. Happened to my 2015, same configuration as yours. They put shims on the motor mounts. They should have replaced them, but cheap is as cheap does. The death shake feeling fixed is temporary. Don't mod anything for at least 20k miles. The steal-ership will turn you away real fast over damn near anything.

this is the trufus's they love sellin' em but don't expect them to fix em'

[volcom8190]

engine/differential/driveshaft angle sounds a bit off or in a bind, had something similar in a previous car, take it to the dealer and make it their problem though