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The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders.

Testing has shown that the Range modules have a very small battery draw when the vehicle is off and in sleep mode.

Los Gatos, California

Our products do not cause damage to a vehicle when used as intended in accordance with the User Manual and should not void your vehicle's manufacturer's warranty.

Yes, disabling AFM can save lifters from failure, as the lifters will be needed less often and thus experience less wear and tear.

Because no tuning is involved with your vehicle's computer, this product will not void the factory warranty. Not only does the AFM Disabler keep your vehicle running smoothly, but it will also have you running on all cylinders, all the time.

The average driver can save approximately 65 gallons of gas per year or about $250.

When you eliminate the AFM system, the extra oil is no longer needed.

The Dynamic Fuel Management system, therefore, could be improved. In the meantime, customers who don't want to put up with this yet-to-be-matured technology can simply disable it with the Range Technology Disabler for AFM as well as DFM.

So a poorly designed OBD device, when left plugged into the OBD port, might completely drain your battery.

Luckily, it seems that the lifters problem does have a fix that is working.

Mercedes, Honda, and Volkswagen have all recently used cylinder deactivation in a wide range of OHC engines, from four cylinders to V12s. Mercedes and Honda use similar systems.