Range Technology RA007 DFM Module for GM Refresh V8 Trucks & SUVs (2021–2024) — Disables Cylinder Deactivation & Auto Stop/Start

The Range Technology RA007 DFM Module disables Dynamic Fuel Management and Engine Auto Start/Stop so your GM V8 operates on all cylinders consistently.

The RA007 is a plug-and-play electronic module engineered for GM Refresh V8 trucks and SUVs from 2021–2024 (SUVs) and 2022.5–2024 (1500 trucks). It intercepts the vehicle’s ECM signals to prevent cylinder deactivation and auto stop/start, returning the engine to a constant V8 mode without cutting cylinders or restarting at stops. Installation is reversible for dealer visits and warranty service, and it’s designed to address the drivability and long-term wear concerns linked to factory cylinder-management systems.

How does the RA007 improve everyday driving?

By preventing the engine from deactivating cylinders and stopping at idle, the RA007 creates a more consistent throttle response and eliminates the mid-throttle hesitation some drivers notice. Drivers experience uninterrupted power delivery and fewer transient pauses when accelerating from stops. This module also restores the full V8 exhaust character that can be dulled when cylinders are frequently shut down.

• Stops cylinder cut-in/cut-out events for smoother acceleration
• Disables auto stop/start to remove restart lag at traffic stops
• Preserves V8 exhaust tone and driving feel

Will the RA007 reduce engine wear and common V8 issues?

The module is designed to prevent the repeated firing pattern changes that can correlate with increased oil consumption, spark plug fouling, and valve train stress reported in some DFM-equipped engines. While outcomes vary by vehicle condition and use, keeping the engine running on all cylinders can reduce the cyclic loading that contributes to certain wear modes. It’s a preventative tool, not a guaranteed fix for existing mechanical problems.

• Reduces frequent cylinder on/off cycles that may stress valvetrain components
• Can help lower conditions that contribute to spark plug fouling and oil usage
• Designed to support long-term consistency in engine operation

How is the RA007 installed and removed for dealer service?

Installation is a simple inline connection to the ECM harness—no permanent wiring modifications are required. The unit plugs into factory connectors and can be removed at any time to return the vehicle to its original, unaltered state for inspection or dealer diagnostics. Because it leaves no lasting changes, it’s compatible with dealer service procedures and software updates.

• Plug-and-play inline design with OEM-style connectors
• No cutting, splicing, or permanent modifications to wiring
• Fully removable to restore factory behavior for service visits

Does disabling DFM and auto start/stop affect emissions or warranty?

Electronic modules like the RA007 alter how the vehicle operates but do not change primary emissions hardware. Laws and warranty terms vary; removing or installing aftermarket devices can affect warranty coverage in some regions. Check local regulations and your vehicle warranty terms before installing to ensure compliance.

• Does not replace emissions components or sensors
• Warranty and regulatory impact depend on local laws and dealer policies
• Designed to be removable for dealer inspections and service

Who this is for: The RA007 is aimed at owners of 2021–2024 GM Refresh V8 SUVs and 2022.5–2024 1500 Refresh V8 trucks who want a steady V8 driving experience, prefer uninterrupted power delivery, and are concerned about long-term engine wear tied to cylinder deactivation or auto stop/start behavior. It’s also suited to drivers who value an OEM-style plug-in solution that can be fully removed for dealer visits. Note: check local regulations and warranty terms before purchasing.

Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.