The failure is so much worse than the lifters. There is a systemic failure at GM right now where they are ignoring these problems, and have been, since the AFM/DOD system first debuted in 2007.

with problems often becoming evident at 75,000 to 125,000 miles. Another issue with these model years is engine knocking, ...

Customers have voiced complaints about GM lifter failures across a wide range of V8-powered vehicles. Which leads us to ask - ...