2015 PPV, front end shakes at 75, why?

[Steve Kincaid]

The front end starts shaking when you hit around 75mph, why?
I have had the front struts and rear shocks replaced. (Bilsteins)
4 new oem steel wheels
4 new tires, Cooper.
Replaced upper and lower control arms
New oem rotors and brake pads
What I’m I missing?

 

[PG01]

Only at 75? Starts at 75 then once you get to 76-80 it stops?

sounds like balance issue to me. Id have the wheels balanced again and swap front to back one side at a time...

 

[Tahoe14]

Road force balance by a competent shop.

 

[OR VietVet]

Did you have it aligned? If so post the readings before and after. Feel in the steering wheel or the floor thru your feet or see the front end shake. Swap the front and rear tires and wheels and see what happens. If the shake follows the front tires to the rear, then you should feel in the seat of your pants. Can even have someone ride in back and see if they feel in their seat.

 

[GreyStone]

The front end starts shaking when you hit around 75mph, why?
I have had the front struts and rear shocks replaced. (Bilsteins)
4 new oem steel wheels
4 new tires, Cooper.
Replaced upper and lower control arms
New oem rotors and brake pads
What I’m I missing?

https://gmauthority.com/blog/2019/12/new-chevy-shake-class-action-suit-blames-problem-on-driveshaft/

 

[Steve Kincaid]

Only at 75? Starts at 75 then once you get to 76-80 it stops?

sounds like balance issue to me. Id have the wheels balanced again and swap front to back one side at a time...

Only at 75? Starts at 75 then once you get to 76-80 it stops?

sounds like balance issue to me. Id have the wheels balanced again and swap front to back one side at a time...

No, it continues to shake and need to slow back down to 70

 

[Rdr854]

No, it continues to shake and need to slow back down to 70

How many miles are on your truck?

 

[Tonyv__]

My 15 yukon shook at 78ish and above. Tires were out of balance. Easiest thing to do is swap front to back to test this theory or put your old wheels on if it didn’t wobble before.

other possibilities are warped out of balance rotors. Which is very unlikely but possible. (Experienced on my Tahoe) And alignment which was stated above

 

[ColoradoPPV]

Had a brand new tire out of round.

Swapping front to back helped discover the problem.

 

[Tahoe14]

Glad you got it figured out.