This bulletin applies to 2014-2019 Chevrolet Corvette and 2016-2019 Camaro vehicles equipped with a 6.2L LT1/LT4 engine. You may find a DTC P06DD set in addition to no or low oil pressure.
The oil control valve may be stuck off, commanding high oil pressure (95 psi) and/or the oil pump face may be damaged. The tensioner spring in the timing chain guide may be “short”, not fully seating into the guide pivot end. Cycling the oil pump control valve will not cause changes in oil pump response. A broken tensioner shoe may allow the spring to rub a hole in the oil pump.
Replace the timing chain tensioner guide. If the oil pump face is damaged and/or worn though, replace the oil pump. Inspect engine bearings for damage that may have resulted in debris from the oil pump.
