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Unlock your engine’s full potential with Range Technology AFM/DFM Disablers, the trusted solution for eliminating GM’s Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems. Designed for drivers who demand consistent power, improved throttle response, and enhanced driving performance, Range Disablers let your V8 stay a V8. All the time.

Simple Plug-In Setup
Connects to your OBD-II port in seconds—no tools, no tuning, no mechanical skills required.
Smoother, More Predictable Driving
Eliminates the hesitation, vibration, and unpredictable power delivery caused by cylinder deactivation.
Safe, Reversible Control
Unplug anytime to return to stock settings. No permanent modifications or warranty concerns.
Works on Most GM Models (2007–Present)
Fits popular Chevy, GMC, and Cadillac vehicles equipped with AFM or DFM.
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Items 1 - 6 of 6 Items
  • DFM Pro
    Best-Seller
    Range Technology
    DFM Pro DFM Pro for GM Refresh V8 - 2021-2026 GM SUV and 2022.5-2026 GM 1500 Truck
    Part# RA010
    Free Shipping

    Backordered

    Est. Ship Date: Due to overwhelming demand we are currently backordered, but product is being built and shipped daily.

    $399.95
  • AFM/DFM Disabler
    Best-Seller
    Range Technology
    AFM/DFM Disabler AFM/DFM Disabler for various 2007-2022 GM models including Silverado, Sierra, Tahoe, Suburban, Escalade, Camaro, Corvette, and more...
    Part# RA003B
    (12)
    Free Shipping

    Backordered

    Est. Ship Date: Building and shipping daily. Your order will ship as soon as possible

    $280.95
  • DFM Module
    Best-Seller
    Range Technology
    DFM Module DFM Module for Refresh V8 models - 2021-2026 GM SUV and 2022.5-2026 GM 1500 Truck
    Part# RA007
    (21)
    Free Shipping

    Backordered

    Est. Ship Date: Building and shipping daily. Your order will ship as soon as possible

    $264.95
  • Pulsar LT for 2019-2022 GM Gas Trucks
    Best-Seller
    Range Technology
    Pulsar LT for 2019-2022 GM Gas Trucks Unlock full control of your GM truck with the Pulsar LT! Adjust throttle response, tire size, gear ratio, and disable AFM/DFM, no tuning or tools needed. Plug-and-play power, performance, and precision for your Silverado, Sierra, or SUV.
    Part# 22451
    (5)
    Free Shipping

    In Stock

    $649.95
  • Factory Refurbished AFM/DFM Disabler
    Range Technology
    Factory Refurbished AFM/DFM Disabler REFURB - 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. *Factory Refurbished
    Part# FRRA003X
    $217.95
  • Factory Refurbished Pulsar LT for 19-22 GM 5.3/6.2L 1500 Gas
    Range Technology
    Factory Refurbished Pulsar LT for 19-22 GM 5.3/6.2L 1500 Gas Unlock full control of your GM truck with the Pulsar LT! Adjust throttle response, tire size, gear ratio, and disable AFM/DFM, no tuning or tools needed. Plug-and-play power, performance, and precision for your Silverado, Sierra, or SUV.
    Part# FR22451
    $460.95
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AFM/DFM Disabler

Run all cylinders, all the time. The Range AFM/DFM Disabler keeps your GM V6 or V8 in full power mode, blocking Active and Dynamic Fuel Management without touching your ECU.