Replacing a failed AFM lifter and pushrod on a 5.3 engine while uncovering the full extent of the problem. #EngineRepair ...

We may receive a commission on purchases made from links. Imagine you could get all the brawny output of a robust V8 engine in your truck when needed, but also get improved fuel efficiency while ...

The logic behind both active fuel management (AFM) and dynamic fuel management (DFM) starts with the simple observation that most drivers "carry more engine" than they need most of the time. A V8 ...

We discovered that number 4 lifter on the AFM has collapsed. I have had the heads cleaned resurfaced and tested. No problems. I have ordered a AFM delete cam kit and a programmer. AFM is going away… ...

My 2018 Silverado Z-71 LTZ 6.2 L with 170,000 miles is beginning to have lifter issues in cylinder number 4. I was originally told by the dealer that it was the exhaust manifold gasket. I won several ...