2016 CHEVROLET TAHOE Wheels Problems

WHILE TRAVELING SOUTHBOUND ON A FOUR LANE HIGHWAY AT APPROXIMATELY 65-70MPH (POSTED SPEED LIMIT OF 65) MY 2016 CHEVROLET TAHOE SEEMED TO HAVE NO STEERING, SIMILAR TO HOW A STEERING WHEEL FEELS WHEN VEHICLE IS OFF, AS THE VEHICLE WAS TRAVELING OVER A KNOLL WITH A SLIGHT CURVE TO THE LEFT. THE ACCELERATOR WAS PRESSED TO CHECK TO SEE IF VEHICLE WAS IN FACT STILL RUNNING, WHICH IT WAS, BUT THE STEERING WHEEL WOULD NOT MOVE. THE BRAKES WERE APPLIED AT WHICH TIME THE TAHOE DARTED LEFT INTO THE OTHER LANE WHERE ANOTHER VEHICLE WAS TRAVELING, CAUSING THAT VEHICLE TO HIT THE TAHOE IN THE DRIVERS SIDE BACK DOOR. THE TAHOE THEN CONTINUED BROADSIDE UNTIL IT BROKE FREE OF IMPACT WITH THE OTHER VEHICLE, AND TURNED BACKWARD INTO THE MEDIAN. THE TAHOE TRAVELLED BACKWARDS THRU THE MEDIAN FOR APPROXIMATELY 80FT AT WHICH TIME THE ACCELERATOR WAS PRESSED TO THE FLOOR...

MY 2016 CHEVY TAHOE SHOOK SO BAD AT 69-74, MPH MY HUSBAND WAS SCARED TO RIDE WITH ME. TOOK TO DEALER THEY KEPT SUV FOR 4 DAYS AND SAID IT WAS THE TIRES. I PUT NEW TIRES ON BUT IT STILL RIDES ROUGH. NOW I HEAR IT'S BECAUSE I HAVE 22 IN WHEELS THAT MAKES IT RIDE ROUGH. SINCE THE TIRES HAVE BEEN CHANGED ABOUT 2 MONTHS NOW IVE BEEN HAVING SLOW SPEED BRAKE PROBLEMS. I'VE ALMOST HIT SEVERAL CARS IN A PARKING LOT AT DIFFERENT TIMES BECAUSE THE BRAKE WANT STOP. I'VE EVEN ALMOST HIT MY HUSBANDS NEW TRUCK IN OUR DRIVEWAY. TOOK IT TO MECHANIC, PUT ON MACHINE AND NOW SAID IT'S A VAC. PUMP ISSUE. I'VE HAD MANY TAHOE AND THIS ONE IS MAKING ME WANT TO GET AWAY FROM CHEVY.

VEHICLE SHAKES AND VIBRATES AT SPEEDS ABOVE70MPH. AT SPEEDS OF 80MPH THE SHAKE IS VERY PRONOUNCED AND THE VEHICLE STABILITY IS AFFECTED. VEHICLE HAS BEEN DOING THIS SINCE DAY ONE. DEALERSHIP HAS TRIED REPLACING TIRES MULTIPLE TIMES BUT NOTHING HAS WORKED. DIFFICULT AND DANGEROUS TO DRIVE THE VEHICLE BETWEEN 70-80 MPH