New GM oil pressure relief valve.  This valve is mounted inside the oil pan.  If you are having a low oil pressure issue with your LS, there are several possibilities for pressure loss, this is one of them, and is an inexpensive insurance policy if you remove your oil pan.  We change them whenever the oil pan is off.  This is a stock replacement part.  Fits the following:

10-14 6.2L Camaro
08-09 6.0L/6.2L G8
07-14 6.0L/6.2L Escalade, Silverado, Sierra, Yukon, Tahoe