NHTSA Complaint #10660176 — 2006 PONTIAC GTO

I HAVE A 2006 GTO THAT WAS MAKING A LOUD HUMMING NOISE BETWEEN 20 AND 50 MPH AFTER A 5,600 MILE ROAD TRIP WHICH TURNED OUT TO BE PREMATURE TREAD WEAR ON THE INSIDE EDGE (APPROX. 2" WIDTH) OF EACH TIRE, WITH THE REMAINING TREAD ON EACH TIRE EXHIBITING NORMAL WEAR. THESE WERE STOCK-SIZE, 2 YEAR-OLD DUNLOP DIREZZA DZ101 TIRES ON THE STOCK 17" WHEELS WITH 18,276 MILES ON THEM. AFTER SEEING THIS I CHECKED THE TIRES THAT CAME WITH THE CAR THAT I KEPT FOR ORIGINALITY AND THEY EXHIBITED WEAR ON THE INSIDE TREAD AS WELL; IT WAS JUST NOT AS NOTICEABLE. I BOUGHT NEW TIRES, HAD THE DEALER PERFORM A 4 WHEEL ALIGNMENT CHECK AND EVERYTHING WAS IN SPECIFICATION. SINCE THE DEALER COULD NOT OFFER A SOLUTION I STARTED CHECKING ONLINE AND NOTICED THAT OTHER PEOPLE HAVE HAD THIS SAME ISSUE. I THEN EMAILED GM PRIORITY CARE AND THEY RESPONDED BY SAYING THE TIRES WERE AT FAULT SINCE THEY WERE NOT ORIGINAL TO THE CAR AND THAT GM WOULD TAKE NO RESPONSIBILITY FOR THIS PROBLEM, EVEN THOUGH I GAVE SUPPORTING DOCUMENTATION FROM OTHER PEOPLE, ALONG WITH EVIDENCE OF THE SAME WEAR ON THE ORIGINAL TIRES. I THEN DISCOVERED THAT THE SUSPENSION ON THESE CARS HAVE QUITE A BIT OF NEGATIVE CAMBER BUILT-IN AND THAT THE CAMBER IS NOT FIELD ADJUSTABLE, SO THE ONLY SOLUTION IS TO REPLACE THE SUSPENSION WITH AFTERMARKET PARTS AT GREAT EXPENSE THAT ALLOW CAMBER ADJUSTMENT. FINALLY, I EMAILED GM PRIORITY CARE AGAIN, EXPLAINED THE NEGATIVE CAMBER ISSUE TO THEM AND ASKED THEM WHICH TIRES I SHOULD PUT ON THE CAR TO PREVENT THIS FROM HAPPENING AGAIN (THE STOCK TIRES ARE NO LONGER MADE), BUT THEY DID NOT RESPOND. SO NOW I MUST DISMOUNT THE TIRES AT EVERY ROTATION TO EVEN-OUT THE WEAR AND HOPEFULLY PREVENT PREMATURE FAILURE. AS A SIDE NOTE, GM REFUSES TO ADDRESS THE SITUATION WITH MY CAR IN ANY CAPACITY EVEN THOUGH IT IS STILL UNDER THE EXTENDED GMPP MAJOR GUARD WARRANTY UNTIL JULY 2016! *TR