Gledewen AFM/DFM Disabler RA003 OBD-II Module — Restores Full Cylinder Operation, Reduces Vibration

The Gledewen RA003 AFM/DFM Disabler is a plug-and-play OBD-II module that prevents Active/Dynamic Fuel Management cylinder deactivation so your GM V6 or V8 runs on all cylinders for more consistent power and reduced AFM-related vibration.

This compact, OEM-quality device is designed to work with a wide range of GM cars, trucks and SUVs equipped with AFM or DFM systems. It installs in seconds into the vehicle’s OBD-II port and requires no wiring or ECU reprogramming. When inserted it tells the vehicle to keep all cylinders active, helping eliminate the intermittent noise, hesitation and uneven feel associated with frequent cylinder on/off cycles. The unit is removable and returns your vehicle to factory operation when unplugged.

How does the RA003 change driving feel and engine behavior?

Once connected, the module signals the vehicle to maintain full-cylinder operation, so throttle response becomes more linear and acceleration feels steadier. Drivers often notice less vibration under light loads and more predictable power when merging or towing. It does not alter fuel mapping or vehicle diagnostics.

• Maintains continuous V6 or V8 cylinder operation
• Reduces AFM-related hesitation and vibration
• Does not modify ECU programming or fuel maps
• Instant effect after plug-in via OBD-II port

Will the RA003 fit my Chevy, GMC, Cadillac or Buick model?

The RA003 supports a broad list of GM models and engine sizes that originally shipped with AFM/DFM, including many Silverado, Sierra, Tahoe, Yukon, Escalade and Enclave years. It is not compatible with 2019+ 5.3L or 6.2L models fitted with 10-speed transmissions—verify fitment against the vehicle list before buying.

• Compatible with many 4.3L–6.2L GM V6 and V8 engines
• Works across Chevy, GMC, Cadillac, Buick and select other brands
• Not for vehicles with 10-speed transmissions (2019+ certain models)
• Check the provided vehicle list for exact year/model coverage

Is installation difficult and will it void warranties?

Installation is plug-and-play: insert the module into the OBD-II port and it begins working immediately—no tools or technical skills required. The device does not reflash or permanently change the ECU; removing it restores factory behavior. However, check your vehicle warranty terms and dealer policies before installation.

• Simple OBD-II plug-in, no splicing or tools needed
• Non-permanent — unplug to revert to stock settings
• Does not write to or erase ECU data
• Recommended to confirm warranty terms with dealer

What are the product’s durability and support features?

Gledewen manufactures the RA003 to meet OEM-style quality checks for reliable long-term use. The unit is housed in a durable enclosure suitable for typical automotive environments, and the package includes a limited warranty for peace of mind. If you experience compatibility or performance issues, customer support channels are available for replacement or refund requests.

• Built and tested to strict quality control standards
• Durable casing designed for in-vehicle use
• 24-month warranty and customer support available
• Sold as a single RA003 disabler module in the package

Who this product is for: The Gledewen RA003 is aimed at owners of GM V6 and V8 vehicles troubled by AFM/DFM-related vibration, inconsistent throttle response or concerns about cylinder on/off wear. It's ideal for drivers who want a reversible, no-tools solution to keep their engine running on all cylinders—especially useful for towing, performance-focused drivers, or anyone seeking smoother everyday operation. Confirm vehicle compatibility against the provided fitment list before purchase.