NHTSA Complaint #11042924 — 2012 CHEVROLET SONIC

12/23/16, I PURCHASED A 2012 CHEVROLET SONIC. 4/6/17, I WAS AT A TRAFFIC LIGHT WHEN SMOKE COME IN THE VENTS FROM THE HOOD OF THE CAR. I CALLED ONSTAR & TO RUN A DIAGNOSTIC. THE DIAGNOSTIC DIDN'T RETURN ANY INFORMATION & I CONTACTED THE DEALER & TOOK THE VEHICLE FOR SERVICE ON 4/9/17. I WAS TOLD THE THERMOSTAT HOUSING WAS LEAKING AND CAUSED THE SMOKING. THE COOLANT SYSTEM WAS FLUSHED & FILLED & A GM OIL, LUBE, FILTER CHANGE WAS DONE. THE VEHICLE WAS READY FOR PICK ON 4/19/17. A FEW WEEKS LATER THE CAR WAS SMOKING AGAIN. I CALLED THE DEALER, I WAS TOLD IT WAS PROBABLY JUST FLUID ON THE ENGINE. THE CAR CONTINUED TO SMOKE PERIODICALLY. 6/7/17, THERE WAS A LARGE POOL OF OIL UNDER THE CAR, I TOOK THE CAR TO A LOCAL SHOP. THEY SAID THAT THE OIL HAD BEEN OVERFILLED & THAT IT BLEW A SEAL. I CALLED THE DEALER, I WAS TOLD THEY DID NOT OVERFILL THE OIL & MADE ANOTHER SERVICE APPOINTMENT. I WAS TOLD AGAIN THERE WAS A PROBLEM WITH THE COOLANT SYSTEM & THE OIL & THAT WAS THE REASON FOR THE SMOKING. REPAIRS COMPLETED 7/10/17. 9/27/17, WHILE DRIVING THE CHECK ENGINE LIGHT CAME ON, SO I CALLED ONSTAR FOR A DIAGNOSTIC & THEY GAVE ME AN ERROR CODE P0299. THEY TOLD ME THAT IT WAS AN AIRFLOW PROBLEM. I CALLED THE DEALER & ASKED FOR THE SERVICE MANAGER & GAVE HER THE ERROR CODE. SHE SAID THERE WAS A PROBLEM WITH THE TURBO & THAT I NEEDED TO BRING THE VEHICLE IN. I TOOK THE CAR TO THEM 10/3/17. 10/4/17, THE SERVICE DEPARTMENT CALLED ME & TOLD ME THAT THE TURBO ON THE CAR WAS BAD. THE REPAIRS WERE COMPLETED ON 10/12/17. 10/13/17 THE CAR OVERHEATED. THE VEHICLE WAS LEAKING COOLANT IN TWO PLACES. I TOOK IT TO A DIFFERENT DEALER & THEY SAID THE T-JOINT IN THE COOLANT SYSTEM WAS LEAKING. THE REPAIRS WERE COMPLETED ON 10/18/17. 11/3/17 AN EMAIL FROM ON-STAR SAID THERE WAS AN ENGINE PROBLEM. I CONTACTED ON-STAR FOR A DIAGNOSTIC & THEY SAID SOMETHING IS WRONG WITH THE COOLANT SYSTEM.