I NOTICED UNDER THE HOOD THAT THERE WAS DEFINITELY AN OIL LEAK DUE TO HAVE THE ENGINE COMPARTMENT COVERED IN OIL. I HAD IT CHECKED OUT. I DID HAVE BOTH VALVE COVER GASKETS REPLACED ONE YEAR BEFORE. THE MECHANIC, WHO WAS A CERTIFIED GM SPECIALIST SAID THAT THIS CAR WAS LEAKING PRETTY MUCH ANY WHERE THERE WAS OIL GASKET. THE VALVE COVERS, CRANKSHAFT GASKET SEAL, REAR MAIN SEAL, INTAKE MANIFOLD, ETC. I DON'T UNDERSTAND THIS CAR. CHEVY DID A BAD JOB WHEN THEY DESIGNED THIS THING. IT IS LITERALLY A LEMON!!!