SCOTTY, I HAVE A 2007 BUICK LACROSSE CXS. IT HAS A FRONT END NOISE THAT I HAVE SPENT $1000 AND IT IS STILL THE SAME. I WAS TOLD AT FIRST IT WAS A BAD TIRE. NEW TIRE DID NOT CHANGE THE NOISE. TOOK IT TO ANOTHER SHOP AND THEY TOLD ME IT WAS THE HEB ASSEMBLEY AND THEY REPLACED IT. I DROVE IT HOME AND STILL THE SAME NOISE. I TOOK IT BACK AND MECHANIC TOOK IT DOWN A BUMPPY ASS ROAD AT 20MPH AND SAID HE DID NOT HEAR IT. I TOLD HIM TO TAKE IT ON THE MAIN STREET THAT WAS JUST PAVED. NOW HE CAN HEAR IT. HE KEPT THE CAR FOR DAYS AND HAD NOT DETERMINED WHAT THE PROBLEM IS.  HE WAS SUPPOSED TO PUT IN ANOTHER HUB ASSEMBLY AND THE NOISE WAS THE SAME. A THIRD HUB ASSEMBLY WAS INSTALLED AND IT STILL MAKES THE SAME NOISE. I CAN ONLY THINK IT IS THE HALF SHAFT MAKING THE NOISE THAT IS THE ONLY OTHER THING THAT TURNS. ANOTHER SHOP TOOK IT FOR A RIDE AND SAID IT WAS THE HUB ASSEMBLEY.  COME ON NOW. SCOTTY WHAT DO YOU THINK COULD IT BE THE HALF SHAFT OR NOT???