2016 Chevrolet Tahoe Wheels Problems

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.