NHTSA Complaint #11229740 — 2018 CHEVROLET CORVETTE

I ATTENDED A TWO-DAY NCM TRACK EVENT AT VIR IN JUNE 2019. DURING THE SECOND SESSION ON DAY TWO MY 2018 Z06 HAD A POWER STEERING ISSUE. WITHOUT ANY WARNING, I FELT AND HEARD A LOUD THUMP THROUGH THE STEERING WHEEL AS I APPROACHED TURN 3 FROM NO-NAME, I HAD VERY LITTLE STEERING ABILITY THAT REQUIRED HEAVY HANDED INPUT ON THE STEERING WHEEL CAUSING ME TO LIFT AND BRAKE TO KEEP THE CAR FROM RUNNING OFF THE TRACK. THEN I RECEIVED A DIC MESSAGE ON THE DASH TO 'SERVICE POWER STEERING GEAR.' I COME IN TO LET THE CAR COOL DOWN AND WENT BACK OUT LATER WITH NO ISSUES BUT WAS NOT RUNNING HAS HARD AS BEFORE. THIS POWER STEERING OVERHEATING ISSUE IS VERY CONCERNING WHEN ON THE TRACK APPROACHING A TURN GOING 70 TO 80 MPH. THE OUTSIDE TEMP WAS 90 DEGREES AND THE COOLING SYSTEM WAS RUNNING AROUND 240 DEGREES. THERE IS A GM PRELIMINARY INFORMATION ABOUT REDUCTION IN STEERING ASSIST WHILE DRIVING ON THE TRACK DURING HOT DAYS. BULLETIN NO.: PI1535B DATE: NOV-2017 THAT REQUIRES TO INSTALL A NEW POWER STEERING GEAR COOLING DUCT FOR 2014-2018 CHEVROLET CORVETTE.