Ok peeps I read all this about the Lifter Campaign and problems with the failure of. I had a 2009 LTZ with the same problem. It popped a PO304 code. went through the whole diagnostic procedure in my garage changing out coils plugs injectors to isolate the fault. And said hold a sec, ran a compression test on Cyl 4 and found 50psi. So what I’m getting at is apparently this lifter issue has been going on for quite some time due to the Junk ass Eco Mode. So when the warranty would only cover the lifters in question and they didn’t think it may have damaged the lobe on the cam I traded that in on the spot for a 2014 LT and chipped it in the OBD connector which turned that system off never had a problem again. So does the 2023 6.2 have the updated lifter campaign already in place?