Check Engine Light On problems of the 2016 GMC Yukon

Tl-the contact owns a 2016 GMC Yukon denali. The contact stated while driving at low or high speeds, the vehicle would violently shake, feeling like it was going to fall apart. The check engine warning light illuminated. The vehicle was taken to cappellino Buick GMC (5411 transit rd, buffalo, NY 14221) where it was diagnosed with a tcc (torque converter) shudder failure and a transmission flush was completed. The dealer advised the contact to drive for 200 miles to correct the failure but the failure continued. The vehicle was taken back to the dealer where another transmission flush was completed. The contact was also informed that the sheet metal on the cross-member was causing the vibration. The cross member was repaired. After, the repairs the inside cabin was uncomfortable, with uneven pressure and a high velocity vibration. The vehicle has had several transmission flushes at cappellino Buick GMC and west herr Chevrolet of williamsville (8040 transit rd, williamsville, NY 14221). The manufacturer was notified of the failure and a claim was filed. The contact was compensated for the failure however the failure has continued. The contact stated that the vehicle was currently at west herr as the vehicle was stalling. The rpm's increased and the vehicle . The traction and check engine warning lights illuminated. The failure has not been diagnosed or repaired. The approximate failure was 42,241. Aa.