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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Range Technology

AFM/DFM Disabler Module

Name: AFM/DFM Disabler Module
Brand: Range Technology
SKU: RNGRA003B

$272.52

SKU: RNGRA003B

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$100 Minimum Order

Non-Returnable Item

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Beginner — under 30 min

Overview

The Range Technology RNGRA003B is an AFM/DFM Disabler designed for GM V8 and V6 engines. This device allows compatible vehicles to run in full-cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders. It simply plugs into the OBD-II port and disables the AFM system without reprogramming the factory ECU. The disabler also turns off the Auto Start/Stop feature and leaves no trace, allowing a return to factory settings by unplugging it.

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The Range Technology RA003B AFM/DFM Disabler is engineered to keep your V6 or V8 GM vehicle operating in full-cylinder mode consistently. This plug-and-play device bypasses the Active or Dynamic Fuel Management system, eliminating cylinder deactivation and ensuring full power delivery without altering the factory ECU. It also includes the functionality to disable the Auto Start/Stop feature. Installation is straightforward: simply plug the disabler into your vehicle's OBD-II port. Should you wish to revert to factory settings, just unplug the device – it leaves no trace of its installation. This disabler is compatible with a wide range of GM V6 and V8 vehicles equipped with AFM or DFM systems, including cars, trucks, and SUVs. However, it's important to note a specific exclusion: the AFM/DFM Disabler is NOT currently compatible with 2019 and newer GM models featuring the 5.3L 10-speed or 6.2L 10-speed transmissions.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Range Technology
Part Number	RNGRA003B
Category	Ignitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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