Full power. All the time.

The Range AFM Disabler Device keeps your vehicle in 8 cylinder mode 100%, preventing the Active Fuel Management system from dropping cylinders.
This is the only product that will disable Active Fuel Management without reprogramming the factory ECU. Full power delivery all the time without factory warranty concerns.

Power to the people.

Learn about the benefits of Range AFM Disabler.

Full Power
No more shuddering or dropping cylinders. Range AFM Disabler keeps you in full power 100% of the time.
Fast and easy setup
Simply plug in Range into your onboard OBD-II port and it instantly begins working to eliminate the AFM system. No tools needed!

See how to install
Bad weather, going off road, or carrying heavy loads, Range V8 delivers the power and control you need in any situation.
The Range V8 does not reprogram your factory ECU. Leaves no trace. ONE MODULE FITS ALL GENERAL MOTORS (GM) ACTIVE FUEL MANAGEMENT (AFM) VEHICLES! Includes cars, trucks, SUVs both V6 and V8!
Range plugs into your vehicle's OBD-II port located under your dashboard.
An OBD-II port is the same port that mechanics use to run engine diagnostics or to evaluate emissions.
Still have questions? Check out our FAQs.
Frequently Asked Questions:

Will installing Range void my warranty?

No. Dealers are not allowed by law to void a warranty due to the installation of aftermarket parts. Since the Range device does not alter the normal operating conditions of the vehicle, it can't do damage.  It simply applies a power smoothing algorithm to ensure that the vehicle operates in its own 4 cylinder mode more often that the stock vehicle.  However, its always best to check with your dealer before installing, or better yet, have them call us directly.

Will Range affect my performance?

No.  Range does not alter the vehicle's ability to return to 8 cylinder mode when needed.  In heavy load situations (i.e., quick throttle, heavy throttle, uphill driving or towing), the vehicle will stay in 8 cylinder mode.  Range just allows you to drive in 4 cylinder mode when you don't need the power.  

Will Range damage my vehicle?

Absolutely not.  Range Technology has spent 2 years and half a million dollars testing this product to ensure safe operation.  We have driven these vehicles hundreds of thousands of miles to perfect the algorithm.  This product maintains all safety systems in the vehicle, but simply allows it to run more efficiently.

What is the 30 day satisfaction guarantee?

Exactly that. You can try the product risk free for 30 days. If you don't like it, we'll send you a label to send it back to us for free and refund the whole purchase price. No questions asked. We know that our business is driven by word of mouth - so we don't want one unsatisfied customer out there.  

Is it hard to install?

Range installs in 5 seconds with no tools. Just plug it in and you are ready to save money on gas. Further, you can uninstall it at any time just by unplugging it. Please see the install diagram here.

Do I have to drive differently?

You don't have to change your driving style at all to save money. Just plug in Range and drive like you normally would. But here at Range, being obsessed with fuel economy, we know that the way you drive can also have an effect on your fuel economy performance, so we have aggregated a list of tips and tricks from our research that can help you drive more efficiently. Interested? Click here and find out even more ways to improve your fuel economy.