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Humva AFM/DFM Disabler OBD2 Module gallery image 1
Humva AFM/DFM Disabler OBD2 Module gallery image 1 Humva AFM/DFM Disabler OBD2 Module gallery image 2 Humva AFM/DFM Disabler OBD2 Module gallery image 3 Humva AFM/DFM Disabler OBD2 Module gallery image 4 Humva AFM/DFM Disabler OBD2 Module gallery image 5 Humva AFM/DFM Disabler OBD2 Module gallery image 6 Humva AFM/DFM Disabler OBD2 Module gallery image 7 Humva AFM/DFM Disabler OBD2 Module gallery image 8
Humva AFM/DFM Disabler OBD2 Module image 1 Humva AFM/DFM Disabler OBD2 Module image 2 Humva AFM/DFM Disabler OBD2 Module image 3 Humva AFM/DFM Disabler OBD2 Module image 4 Humva AFM/DFM Disabler OBD2 Module image 5 Humva AFM/DFM Disabler OBD2 Module image 6 Humva AFM/DFM Disabler OBD2 Module image 7 Humva AFM/DFM Disabler OBD2 Module image 8
(4.8/5 794 Reviews) Trustpilot

AFM/DFM Disabler OBD2 Module

A plug-in OBD2 module for compatible GM vehicles that helps keep the engine out of AFM/DFM cylinder-deactivation mode.

Secure checkout · Next day shipping

Only a few left in stock
Description

A plug-in AFM/DFM disabler made for compatible GM vehicles that use Active Fuel Management or Dynamic Fuel Management. It connects through the car's OBD2 port and is designed to keep the engine running in V6/V8 mode without factory ECU reprogramming.

  • Plugs directly into the vehicle OBD2 port with no tools required
  • Helps keep compatible engines out of AFM/DFM cylinder-deactivation mode
  • Can be unplugged to return the vehicle to the factory behavior
  • Built for compatible Chevy, GMC, Cadillac, Buick, Pontiac, and other listed GM-platform models shown in the gallery
  • Not shown as compatible with 10-speed transmission models or 2022+ refresh models
Why customers love it
Some compatible GM engines switch between cylinder modes through AFM or DFM. The Humva AFM/DFM Disabler plugs into the OBD2 port and communicates with the vehicle ECU to help keep the engine in full-cylinder mode during everyday driving. It is made for drivers who want a simple plug-in setup without factory ECU reprogramming.
Specifications
Product type: AFM/DFM OBD2 disabler module
Connection: vehicle OBD2 port
Install style: plug and play, no tools required
Primary function shown: helps keep compatible engines in V6/V8 mode
Return to factory behavior: unplug the module
Compatibility shown: select Chevy, GMC, Cadillac, Buick, Pontiac, Isuzu, Saab, Saturn, Suzuki, and Holden models listed in the gallery
Important fit note shown: does not fit 10-speed transmission models or 2022+ refresh models
Use note: confirm the model, engine, and year against the gallery before ordering.
How to use
With the vehicle safely parked, locate the OBD2 port under the dashboard. Plug the module fully into the port and wait for the indicator light shown on the device. Drive normally after installation. To return the vehicle to factory behavior, unplug the module from the OBD2 port.
Shipping & returns
Orders are processed through Humva with secure checkout and tracking when available. Most orders process quickly with next day shipping where available. If your order arrives damaged, defective, or not as expected, contact Humva within 30 days and we will help with the next step.
TikTok reviews

See the AFM/DFM disabler in real vehicle setups.

Humva AFM/DFM Disabler

  • ✓ Plugs into the OBD2 port with no tools required
  • ✓ Designed to help keep compatible engines in full-cylinder mode
  • ✓ Unplug to return the vehicle to factory behavior
  • ✓ Includes compatibility guidance in the product gallery

Stock AFM/DFM behavior

  • Can switch between cylinder modes during everyday driving
  • May feel less consistent to drivers who prefer full-cylinder mode
  • Factory behavior stays active until changed or disabled
  • Compatibility still needs to be checked by model, year, and engine
Support

Try the plug-in setup, risk-free.

Check your model and year against the compatibility chart before ordering. If your order arrives damaged, defective, missing parts, or not as expected, contact Humva within 30 days and we will help with the next step.

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