Jul 14, 2025 · This AFM module is a reliable choice for deactivating the Active Fuel Management on Flex Fuel, Vortec, and LS small-block engines. It allows GM trucks to stay on the V8 mode and …

This plug-in device disables Active and Dynamic Fuel Management, keeping your engine in all-cylinder mode at all times. No reprogramming, no warranty risk—just consistent power when you need it.

Browse AFM/DFM disablers for Chevy and GMC vehicles. Protect your engine lifters and enjoy improved performance with plug-and-play installation.

Range Technology’s AFM-DFM Disabler instantly turns off GM’s Active or Dynamic Fuel Management systems. Keep your V6 or V8 in constant power mode without reprogramming or voiding your warranty.

Jan 23, 2026 · An AFM disabler keeps your engine in full V8 mode, reducing lifter failure risks and improving drivability, but it may slightly lower MPG—worth it for longevity if you plan to keep your …

Jul 2, 2025 · Tired of your GM truck or SUV’s Active Fuel Management (AFM) or Dynamic Fuel Management (DFM) causing problems? The BOOST AFM & DFM Disabler keeps your engine …

Jun 13, 2024 · There are plenty of awesome AFM disablers currently on the market, and from names you trust, no less. Range Technology may have a niche focus, but they’ve quickly become a …

Nov 30, 2017 · 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 …

This simple plug-and-play device disables GM’s Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems, allowing your engine to run in full cylinder mode at all times.

Jan 8, 2024 · But for some, that familiar rhythm is punctuated by an unwelcome intruder: Active Fuel Management (AFM). This technology, also known as Dynamic Fuel Management (DFM) in certain …