NHTSA Complaint #11376767 — 2018 GMC SAVANA

MY 2018 VAN IS AN EXPLORER CONVERSION WITH 13000 MILES ON IT. IT WAS TAKEN TO GMC FOR REPAIRS FOR WHAT THE TECH IS CALLING A "DEATH WOBBLE". BASICALLY THE VAN AT UNPREDICTED TIMES GETS INTO A ROUGH SHAKING IN THE FRONT END THAT FORCES YOU TO STOP. THIS HAPPENED WHILE BRAKING GOING DOWN STEEP GRADES (5%+), ALSO TURNING ONTO A SLOPED ROAD AND AGAIN JUST TRAVELING ON A HILLY ROAD WITHOUT AND USE OF BRAKES. DEALER FOUND THAT 3 OF THE 4 RIMS WHICH WERE INSTALLED BY EXPLORER CONVERSION VANS ARE WARPED OR BENT. THE TIRE SIZE INSTALLED IS 20" WHICH IS DIFFERENT THAN THE STOCK SIZE OF 16". THE CURRENT TIRES ARE PIRELLI SCORPION VERDE 265/50/R20. THE VAN HAS ONLY BEEN DRIVEN ON STANDARD ROAD AND NEVER COLLIDED WITH OR RAN OVER ANY OBJECT IN THE ROAD. UNKNOWN AT THIS TIME IF REPLACING THE WHEELS WILL FIX THE ISSUE DUE TO ISSUES OBTAINING REPLACEMENTS. BIGGER CONCERN IS 3 OUT OF 4 WHEELS FAILING UNDER NORMAL ROAD CONDITIONS AND USE.