Sounds like a loose spark plug or 2. My daughter's 2 cruzes sounded the same and just had to tighten them. They are prone to this. Keep us posted if this helpedI got in my 2011 Cruze yesterday and heard a bad noise coming from the engine. Its kinda loud when you start it up but calms down but when you step on the gas it makes the noise. Anyone know what this could be?
Link is the noise