Range Technology RA003B Blue AFM/DFM Disabler is a plug-and-play OBD2 module for 2007–2022 GM V6 & V8 cars, trucks and SUVs. It disables GM Active Fuel Management(AFM) and Dynamic Fuel Management(DFM), letting your engine run full cylinders at all times. No ECU reprogramming, reversible design, simply unplug to restore factory settings. It also turns off auto start-stop.
The Range AFM/DFM Disabler is the trusted plug-and-play solution to eliminate GM Active Fuel Management (AFM) and Dynamic Fuel Management (DFM). This OBD2 module keeps your GM V6 / V8 engine running on all cylinders 100% of the time. No more vibration, hesitation and rough power transition caused by cylinder deactivation.
✅ Key Features
Plug & Play: Directly insert into vehicle OBD-II port, ready for use instantly
No ECU Reprogramming: Will not modify factory ECU calibration
Fully Reversible: Unplug the device to return to stock factory state, leaves no trace
Disable AFM / DFM & Auto Start-Stop
Blue LED indicator
Fit for GM V6 V8 vehicles: Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Camaro, Corvette etc. (2007-2022)
Made in USA
⚠️ Important Notes
Not compatible with 2022.5+ Refresh trucks or 2021+ GM SUVs
Unplug the device if your vehicle will not be driven for several days, some vehicles may have minor battery drain.
FAQ :
What does RA003B AFM/DFM disabler do? It disables GM AFM/DFM cylinder deactivation system, keep engine full-cylinder running, also disable auto start-stop.
Is tuning required for Range RA003B? No tuning or ECU flash needed. Just plug into OBD2 port.
Will it void my vehicle warranty? This module does not rewrite ECU. Remove the unit and your car returns fully to factory settings.
Which vehicles fit RA003B? Most GM V6/V8 2007–2022 trucks, SUV and cars. Not support 2022.5+ refresh GM trucks and 2021+ SUVs.
1. Sampling time
Normally, if we have inventory in the warehouse, it will be supplied within 3-5 days. If production is required, it will take our normal 7-10 days
project If it is newly developed, then it will speak.
2. Minimum order quantity
For products that we have inventory or regularly produce, the minimum order quantity is 1 box.
For newly produced items, the minimum order quantity is 10-50 boxes depending on the material conditions.
3. Production time
For newly produced products, it usually takes 30-40 days, depending on the quantity.
If there is inventory or semi-finished materials, it will be faster.
4. Payment deadline
1) Advance small batch T/T.
2) Normal order: 30% deposit in advance, balance before shipment by T/T or copy of bill of lading.
3) A letter of credit with an order amount greater than $50000 is acceptable.