Vibration issue

[Pat11784]

Drive a 2013 PPV. Still trying to figure out why my truck starts to shake at the wheel when i get around the 75-80mph mark. Wheels are brand new and not bent, tires are brand new, been road balanced a few times, truck had a negative camber when i went down from 24s to 22s. Got a new alignment and its still slightly negative. Truck is lowered as well. Should i look at replacing the tie rod ends, front upper and lower control arms?

The silverados have a well known driveshaft vibration issue at highway speeds, I haven't heard about it in Tahoe but it's worth a look.

 

[balln2k11]

Kee. Go to Arrow Alignment. I wouldn’t waste anymore time and money assuming. I had similar issue and replaced all my suspension parts with little improvements. I even replaced all new tires twice in 4 months thinking I had bad tires.

For me, my steering rack bushings that hold in place were cracked causing the chatter.

 

[iamdub]

Steering wheel and butt. I even look over and see the pax seat shaking a bit

I'd try, as suggested, rotating the driveshaft 180°.

 

[B-Watt]

Did this get resolved? I'm experiencing the same thing at the same speeds in my 2012 PPV. I'm curious, could it possibly be from the Active Fuel Management System?