NHTSA Complaint #11206598 — 2006 PONTIAC G6

THE VEHICLE VIBRATES IN A CERTAIN PATTERN WHEN ABOVE 55 MPH ON THE HIGHWAY, NO ONE SEEMS TO BE ABLE TO FIGURE OUT WHAT IS CAUSING IT. ALL 4 STRUTS ARE NEW, SWAY BAR BUSHINGS, SWAY BAR LINKS, CONTROL ARMS BOTH UPPER AND LOWER, ALL BRAKE ROTORS ARE NEW. CANNOT GET THE PROBLEM DIAGNOSED BY ANYONE BECAUSE THEY CANNOT FIND OUT WHAT IT IS. ALSO THE CHECK ENGINE LIGHT TURNS ON AND OFF (CODE GIVEN IS FOR RUNNING LEAN) BUT NO MECHANIC OR DEALERSHIP HAVE FOUND WHY IT'S HAPPENING. ONE DEALERSHIP EVEN TOLD ME IT COULD BE THE CARS ECU. SO THEY TOLD ME TO VERIFY IF MY CAR HAD ANY RECALLS. PLEASE, ANY HELP ABOUT THIS IS GREATLY APPRECIATED THIS PROBLEM HAS BEEN GOING ON FOR OVER A MONTH NOW (TODAY'S DATE 5/9/19)