Wrenching With Kenny on MSN

This failed AFM lifter caused more damage than expected

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

Reply To: AFM Lifter collapse

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… ...
AOL

GM's AFM And DFM Often Get Blamed For Lifter Failure, So Let's Explore How They Work

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 ...