I have a 2012 chevy impala ltz This is the 2nd time starting the car and hearing a tapping noise. It lasts a few minutes and goes away. It has only 85,000 mi. Any suggestions.

Try having a de-carbon service performed" Carbon left over from your fuel gets trapped in combustion chambers and the pistons will actually hit the carbon and make noise, after it warms up in many cases the noise will go away, A leaking lifter can also cause the noise" Lifters are hydraulic and filled with engine oil, to keep the oil in the lifter they use a spring loaded ball to act as a one way valve, if any debris get into the sealing area of the check ball it will allow the lifter to bleed down and make noise during restart until the lifter pumps back up, If this is the case a engine flush before the next engine oil service would be recommended worse case it may need a new lifter.

Call the magic mechanic and ask they will tell you what they think it is and what will cost to repair.