— The engine malfunctioned. Started making noises on cold start that quickly turned into noises when driving and rough idling. It is at the Cadillac dealership being inspected right now. Car is available for inspected upon request. — The safety was put at risk with the potential of complete engine failure. — I received a call from Cadillac yesterday that the camshaft is faulty and they will need to replace it. — Cadillac has reached out to my warranty company to inspect it further. — The only warning was the noise, I noticed it in March, the noise got much very quickly.