Didnt even beat on the car today or do anything... just fired it up to put it away and heard a really faint tick for a second. Popped the hood and gave it rev and you can hear some sort of chattering noise right when the motor comes back down to idle. No codes or anything and car feels fine. Definitely sounds like something inside the motor though. Is this just maybe an LS1 being cold and making some noise until it gets to normal operating temp? I know this isnt a lot of info, but tell me what you think. Thanks.

 

This may not be it but I know that sometimes one of my sparkplugs backs out a bit and cause a ticking noise....

B