BrokenNinjaLeg

Im brand new to the LS scene. I just purchased a 2006 Envoy Denali for pretty cheap, but im unsure of what engine it has. I plan to rebuild it because it has an inconsistent miss and the slightest amount of non-magnetic metal in the oil. After removing the intake, i can see that it doesn't have a DOD valley cover. It has a gen 4 valley cover with no knock sensors or plug in the back. Im assuming the LH6 was swapped out of this vehicle with another gen 4 engine. The only codes i found were for the oil pressure sensor and for the missfire. It runs, drives and shifts perfectly, aside from the miss, with 168k on the dash. What engine could this be?

G Atsma

It could still be an LH6 that's been converted to non-AFM/DOD. It's not that involved, though head removal is needed to switch out the lifters and trays. It might still have the original cam.
Any way of getting any casting numbers? It might not be a 5.3, though it most likely still is.