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… ...
Jalopnik

Can An Active Fuel Management (AFM) Disabler Cause Engine Damage?

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.