GM's Active Fuel Management (AFM) improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. It is also known as Displacement on Demand (DoD) or cylinder deactivation. Under certain conditions, it can help lead to 5-7 percent greater fuel-efficiency.

So why disable it?

Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust, and others want V8 power under their foot at all times. Also, AFM lifters have a history of failing and oil consumption can be a problem.

There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engine—one is to install an AFM Disabler, and the second is to install an AFM Delete Kit. We'll cover those options in this video and also show you how to identify AFM-equipped engines.

Items Featured in this Video:
AFM Disablers: https://www.summitracing.com/search/p...
AFM Delete Kits: https://www.summitracing.com/search/p...

NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. Learn more here: https://www.onallcylinders.com/2014/0...