Review on 🔧 Authentic GM 12570427 Valve Rocker Arm Cover by Aaron Wilson

This is the most redesigned driver side valve cover for the GMT800. It has a built in PCV valve so you don't need a new one. The kit includes an ACDelco valve cover gasket which is much thicker and nicer than the Felpro Permatex gasket I bought. The design differences between this and the old one are obvious. This should solve the problem of oil consumption due to poor PCV on these engines. I installed this on my 02 L59 Flexfuel Suburban. The only problem was that the box was completely damaged in transit and the packaging material was unused so the lid had some dents. Overall very satisfied and would recommend. Oh, that includes new bolts and bushings too. Be sure to use a torque wrench when digging up to 106 in-lbs.