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Your cart is empty.The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders.;Range AFM/DFM Disabler keeps you in full power 100% of the time.; Simply plug into your onboard OBD-II port and it instantly begins working to eliminate the AFM/DFM system.; The power and control you need in any situation.; The Range AFM/DFM Disabler does not reprogram your factory ECU.; Leaves no trace. Unplug it to return to factory settings; Fits all V6 and V8 General Motors (GM) active or dynamic fuel management vehicles, includes cars, trucks, and SUVs.;
Elmer Fudd
2025-08-17 18:48:24
It plugs in easily but I read it will drain the battery if the truck sits too long so I have to take it out too often.
Schmitty549
2025-07-29 10:38:42
If you are having AFM/DFM issues like we have all had in our GM vehicles, this is the device you want. How it compares to other manufactures of similar devices, I cannot comment on. However, Holley Performance, who I believe is the parent company who manufactures these devices, is the best name in the business when it comes to anything and everything tuning related.This device is beyond easy to use as you simply plug it in, and forget it. Instead of the jerky shifting between V8 and V4 cylinder modes in my 2015 Silverado, it keeps my truck in V8 mode all the time. Gas mileage may be slightly worse, you're driving a V8 pickup, but who cares. Not having to (hopefully) not rebuild the top end of my engine when the lifters collapse again will pay this little gadget off 10X over again. I would highly recommend this to all GM truck owners with the 5.3 to delete V4 mode.
Kenneth C Loria
2025-07-15 15:08:49
Price can always be better!!
Customer
2025-06-18 17:18:27
Worked great no more 4 cylinder all V8
Ken
2025-06-15 11:31:24
Works as described. Makes it drive like a different car. Whoever designed the AFM should be banished from society.
byron
2025-04-18 14:50:25
Lowered my fuel mileage but engine drives and shifts much better now. Engine even sounds better when cruising on interstate. I drive a 2018 5.3ltr. GMC Sierra
Eddie Banks
2025-03-24 12:27:41
Haven’t had any issues with corvette switching into v4 since install.. I don’t remove it after driving and haven’t noticed any issues with battery drain.. the lites go out once car is off so idk if it is even still powered but it definitely works and worth the $200 to not have to rebuild motor from AFM
Jeremy
2025-03-01 14:20:43
After reviewing their website for Range, it said their disablers will work for both V6/V8 engines. However, after purchasing and not noticing much difference I asked their customer service if it was compatible, it is not.
mark
2025-01-28 14:12:04
easy install,instantly sounded different, better performance all across the board,truck shifts better, gas mileage on day to day driving was a tad bit better,on a highway trip towing an atv trailer my gas mileage wasnt as good but a decent trade off for better power on the hills, will i keep it installed? most definatley!
Austin
2025-01-22 13:03:12
No BS, literally plug and play.All-time V8 is superb, even in places like parking lots not having to step on the pedal just to move a bit is great. The 5.3 sounds great too when it's firing on all cylinders.
Customer
2024-12-17 15:59:51
Liked that I now have 8 cylinders for passing without the bogging. Mileage has not changed. When coming up to stop signs and lights I find that it downshifts a little harder than it did before.
Austin
2024-12-15 21:59:38
Easy peezy, does as described
Barry Modin
2024-12-01 14:58:34
My 5.3l sounds better and might just save my lifters!
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