ON 7/14 AM I HAD THE CHEVROLET DEALER PUT 2 NEW TIRES AND HAD AN ALIGNMENT DONE. WE LEFT ON TRIP LATER THAT DAY AND IN A HEAVY RAIN STORN NEAR JACKSONVILLE, AR, WITHOUT ANY WARNING THE TRUCK SPUN OUT OF CONTROL ON HWY 167S DUE TO SEVERE HYDROPLANING. THE NEXT DAY I LOOKED AT THE TIRES AND THEY WERE NOT THE SAME TIRES AS ON THE REAR OR AS SPECIFIED BY GM. THEY SHOULD HAVE BEEN P245 AND THEY WERE MS245. I RECALL WHEN I FIRST LOOKED AT THE TRUCK WHEN WE PICKED UP AT THE CHEVROLET GARAGE THAT THEY DID NOT LOOK "NEW". THEY WERE DUSTY AND DIRTY AND DID NOT HAVE THE "NEW TIRE STIPLING" THAT I HAVE SEEN ON OTHER NEW TIRES THAT I HAVE PURCHASED. I LATER FOUND OUT BY GOODYEAR THAT THE TIRES SHOULD HAVE BEEN PUT ON THE REAR OF THE VEHICLE. I HAVE DONE A LOT OF DRIVING IN SNOW AND RAIN AND WHEN I NOTICE HYDROPLANING, I SLOW DOWN. BUT IN THIS ACCIDENT THERE WAS NO WARNING. WHEN I FIRST CALLED THE CHECROLET DEALER THEY SAID THAT 245 EURO TIRES WERE PUT ON MY TRUCK AND THEY WERE BETTER THAN THE P245 TIRES AND TO CONTACT THERE LAWYER. I THINK THE TIRES THEY PUT ON THAT THEY SOLD AS NEW, WERE TAKEN OFF OF ANOTHER VEHICLE AND PUT ON MY TRUCK . I ASKED THEM IF THEY WOULD SHOW ME THE ORDER, BILL OF LADING, AND PACKING SLIP ANE AGAIN THEY REFERRED ME TO THEIR LAWYER.