1. Product Overview
The Chatbrid AFM/DFM-1 Disabler is an advanced device designed to permanently deactivate the Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems in compatible General Motors (GM) vehicles. This device ensures your engine operates continuously on all cylinders (V6 or V8 mode), preventing the system from deactivating cylinders for fuel economy. This can lead to consistent engine performance and potentially reduce wear associated with cylinder deactivation cycles.

Figure 1: Chatbrid AFM/DFM-1 Disabler device.

Figure 2: Key features of the AFM/DFM Disabler.
2. Setup and Installation
The AFM/DFM-1 Disabler features a tool-free, plug-and-play design for easy installation. No technical expertise or special tools are required.
- Locate the OBD-II Port: The OBD-II (On-Board Diagnostics II) port is typically located under the dashboard on the driver's side of your vehicle.
- Insert the Disabler: Align the AFM/DFM-1 Disabler with the OBD-II port and firmly push it in until it is securely connected.
- Verify Connection: Once plugged in, the device will illuminate blue indicator lights, confirming it is active and communicating with your vehicle's system.
- Start the Vehicle: Start your vehicle as usual. The device will begin functioning immediately, ensuring your engine operates in V6/V8 mode.

Figure 3: Plugging the AFM/DFM-1 Disabler into the OBD-II port.
Video 1: Demonstration of installing the AFM Disabler in a Silverado, showing the device being plugged into the OBD-II port and the indicator lights activating.
Video 2: Installation and function overview of an AFM Disabler for V6 & V8 GM Vehicles, highlighting its plug-and-play nature.
Video 3: Demonstration of the AG001 AFM Disabler working on a 5.3L Silverado, showing the device plugged in and the dashboard display.
Video 4: Overview of the AFM DFM Disabler AG003 Pro for 5.3L Silverado, showcasing its features and ease of use.
3. Operating Instructions
Once installed, the AFM/DFM-1 Disabler operates automatically. It ensures your engine remains in its full cylinder mode (V6 or V8) at all times, providing consistent power and responsiveness without the interruptions of cylinder deactivation.
- Continuous Full Power: The device maintains the engine in V6/V8 mode, eliminating the transition between cylinder modes.
- No ECU Reprogramming: The disabler does not alter your vehicle's original Engine Control Unit (ECU) programming. It works by sending signals to prevent cylinder deactivation.
- Reversible: To revert to factory settings, simply unplug the AFM/DFM-1 Disabler from the OBD-II port. The vehicle's system will instantly return to its original programming.

Figure 4: Dashboard display confirming continuous V8 operation.

Figure 5: The disabler ensures all cylinders are active continuously.
4. Compatibility
The AFM/DFM-1 Disabler is compatible with a wide range of GM vehicles equipped with V6 or V8 engines (4.3L, 5.3L, 6.0L, 6.2L) that utilize Active Fuel Management (AFM) or Dynamic Fuel Management (DFM). Please verify your specific vehicle model and year against the list below before purchase.
Compatible Vehicle Models:
- Silverado & Sierra 1500: 2007-2022 models (4.3L, 5.3L, 6.0L, and 6.2L engines). Does not fit 10-speed transmissions for 2019+ models or 2022 Refresh models.
- Escalade: 2007-2020 models (5.3L, 6.0L, 6.2L engines).
- Suburban/Tahoe/Yukon: 2007-2020 models (5.3L, 6.0L, 6.2L engines).
- Chevy Avalanche: 2007-2013 models (5.3L and 6.0L engines).
- Chevy Camaro: 2010-2024 models (3.6L V6 and 6.2L V8 engines).
- Chevy Corvette: 2012-2019 models (6.2L V8 engines).
- Colorado / Canyon: 2015-2020 models (3.6L V6 engines).
- Other Chevy Vehicles: Blazer (2020-2022 - 3.6L); Caprice (2011-2017 - 6.0L); Equinox (2008-2009 - 3.6L); Express 1500 (2014 - 5.3L); Impala (2006-2009 - 3.9L and 5.3L); Malibu (2006-2012 - 3.6L and 3.9L); Monte Carlo SS (2006-2007 - 5.3L); SS (2014-2017 - 6.2L); Trailblazer (2006-2009 - 5.3L); Uplander (2006-2008 - 3.9L).
- Other GMC Vehicles: Acadia (2007-2008 - 3.6L).
- Other Buick Vehicles: Enclave (2008-2020 - 3.6L); Envision (2017-2018 - 2.5L); Equinox (2008-2009 - 3.6L); Lacrosse (2005-2009 & 2016-2018 - 3.6L and 5.3L); Rainier (2005-2007 - 5.3L); Rendezvous (2006-2007 - 3.5L and 3.6L); Terraza (2006-2007 - 3.9L).
- Other Cadillac Vehicles: ATS (2013-2019 - 3.6L); CTS (2004-2019 - 3.6L, 6.0L, and 6.2L); CT6 (2016-2018 - 3.0L and 3.6L); SRX (2004-2009 - 3.6L); STS (2005-2007 - 3.6L); XT5 (2017-2019 - 3.6L); XTS (2013-2018 - 3.6L).
- Other Vehicles: Isuzu Ascender (2005-2006 - 5.3L); Saab 9-7X (2005-2009 - 5.3L); Saturn Aura (2007-2009 - 3.6L); Saturn Outlook (2007-2008 - 3.6L); Saturn Relay (2006-2007 - 3.9L); Saturn Vue (2008-2009 - 3.6L); Suzuki XL-7 (2007-2009 - 3.6L); Pontiac Montana (2006-2009 - 3.9L); Torrent (2008-2009 - 3.6L).
Incompatible Models:
- Silverado/Sierra 2022.5-2024 (Refresh Models)
- Suburban/Tahoe/Yukon 2021-2024
- Any models with 10-Speed Transmission

Figure 6: Partial list of compatible Chevrolet models.

Figure 7: Partial list of compatible Pontiac, Buick, Saab, Isuzu, Holden, and Saturn models.

Figure 8: Partial list of compatible GMC, Suzuki, and Cadillac models.
5. Maintenance
The Chatbrid AFM/DFM-1 Disabler requires minimal maintenance. It is designed to be a set-and-forget device. However, if you plan to store your vehicle for an extended period (more than one week) without operation, it is recommended to unplug the device from the OBD-II port to prevent any potential battery drain, as the device draws a small amount of power to maintain its active state.
6. Troubleshooting
- Device Not Lighting Up: Ensure the device is fully and securely plugged into the OBD-II port. Check for any debris in the port that might prevent a proper connection.
- Engine Still Entering V4 Mode: Verify that your vehicle is listed as compatible. Ensure the device's indicator lights are active after starting the vehicle. If issues persist, unplug the device, restart the vehicle, and then re-insert the device.
- Battery Drain (for stored vehicles): If your vehicle is not driven for more than a week, unplug the device to prevent potential battery drain.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | AFM/DFM-1 |
| Item Weight | 1.76 ounces |
| Package Dimensions | 3.98 x 2.52 x 1.14 inches |
| Installation | Plug-and-Play (OBD-II port) |
| Compatibility | GM V6/V8 engines with AFM/DFM (specific models/years apply) |
8. Warranty and Support
The Chatbrid AFM/DFM-1 Disabler comes with a 3-year warranty. Your satisfaction is our top priority. If you encounter any quality issues or are not fully satisfied with your AFM Disabler, please contact us without hesitation. We offer hassle-free returns or exchanges to ensure 100% customer satisfaction.
For support, please refer to the contact information provided with your purchase or visit the official Chatbrid product page.