Range Technology RA003R AFM/DFM Disabler-Red | 2020-2024 GM Silverado/Sierra 1500

Features:

• Keeps engine in full-cylinder mode
• Disables AFM and DFM systems
• Disables Auto Start/Stop function
• No factory ECU reprogramming needed
• Protects your factory warranty coverage
• Installs easily via OBD-II port
• Leaves no trace when unplugged
• Compatible with 5.3L and 6.2L engines
• Fits most 2020–2024 GM V6 and V8s
• Red LED is cosmetic only
• Made in the USA
• Complies with EPA Tampering Policy

Unlock The Power Your Truck Was Built For

If your GM truck doesn’t feel like it’s pulling its weight the way it should, there’s a good chance the factory AFM or DFM system is holding it back. The Range Technology RA003R AFM/DFM Disabler steps in to fix that, keeping your V6 or V8 engine firing on all cylinders, all the time. This means smoother acceleration, better throttle response, and a truck that feels like it’s finally running at its full potential. Whether you're hauling gear, towing a trailer, or just want a better driving experience around town, this plug-and-play device makes a real difference. It also disables that annoying Auto Start/Stop feature, so your engine stays on until you say otherwise. Best of all, it installs in seconds with no tools and doesn’t mess with your factory ECU, so your warranty stays intact. And when you’re ready to return things to stock, just unplug the unit and you’re back to factory settings.

Reliable Cylinder Control Without Permanent Changes

The RA003R disabler is built around Range Technology’s patented solution that prevents both Active and Dynamic Fuel Management systems from dropping cylinders during operation. It works through the OBD-II port without reprogramming the vehicle’s ECU, which helps preserve long-term reliability and avoids factory warranty complications. Once connected, it instantly locks your engine into full-cylinder mode, delivering consistent power without the unpredictable shifts between four and eight cylinders. This unit is fully compatible with most 2020–2024 Silverado and Sierra 1500 trucks running 5.3L or 6.2L V8 engines, as well as select V6 models. It also shuts off the Auto Start/Stop function, something many drivers find frustrating in everyday traffic. The red LED light is purely cosmetic and makes no difference in performance. For best results, the disabler should be unplugged if the vehicle is going to sit for several days, as it may draw power from the battery. This product is made in the USA and is currently legal for on-road use in states that follow EPA’s Tampering Policy, but is not yet legal in California.

Fits: 2020, 2021, 2022, 2023, 2024 GM Silverado/Sierra 1500

Notes:

• Only compatible with 2020–2024 GM V6 and V8 engines
• Not compatible with 2022.5+ GM refresh trucks
• Does not support 2021 and newer GM SUVs
• Check 2022 VIN for compatibility (12th digit ≤ 4)
• Should be unplugged if vehicle sits for days
• May cause battery drain if left plugged in
• Device does not modify or flash ECU
• Safe to remove at any time without trace
• Red LED is a visual preference only
• Made in the USA by Range Technology
• Legal in most states under EPA Tampering Policy
• Not legal for sale or use in California