Originally Posted by hillbill
The active fuel management crap is the culprit, cuts oil pressure to the lifters on the deactivated cylinders, have had 2 at work recently that went south, about a 2,000.00 fix.
Without AFM they are great engines.


^^^^^^^^^^^^

This

2009 Silverado 1500 with a 5.3 and no AFM. 183K and still doesn't use a quart between changes.

Wollen nicht krank dein feind. Planen es.