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 ...

A common issue with the 5.3 engine is AFM lifter failure. In this video, we diagnose the problem and replace the failed AFM lifter and pushrod to get the engine running properly again. Follow along ...

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… ...

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. It is ...

So, you're worried your Silverado or Sierra might run into Active Fuel Management (AFM) issues someday. But are they as bad as the internet would lead you to believe? Well, the short answer is yes.