Description
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.;
Imported customer feedback
What customers reported
4.4 / 5
159 ratings
Source: Amazon. These reviews were imported from the source marketplace and are not reviews of purchases made on this website.
Vehicle information
Available fitment details
Listing compatibility notes
- 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.
Fitment data is provided as a buying aid. Verify the listing against your vehicle and existing part before ordering.
Exact identity, part numbers, model references, and available compatibility evidence
Buying guidance
Quick decision
An identity-first engine management systems listing organized around stable product references and available compatibility evidence.
Fit and size notes
- Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
- Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.
Specification notes
- Canonical product: MP-US-B08941LBBR
- Source product ID: B08941LBBR
- Category: Replacement Parts / Engines & Engine Parts / Engine Management Systems
- Available images: 1
Before you buy
- Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
- Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.
Schmitty549 –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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.
Austin –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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.
Barry Modin –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
My 5.3l sounds better and might just save my lifters!
Kenneth C Loria –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
Price can always be better!!
Customer –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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 –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
Easy peezy, does as described
Eddie Banks –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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
mark –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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!
byron –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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
Elmer Fudd –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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.
Ken –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
Works as described. Makes it drive like a different car. Whoever designed the AFM should be banished from society.
Jeremy –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
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.
Customer –
Imported from Amazon. This is not a review of a purchase made on this website.
External marketplace context: Verified Purchase
Worked great no more 4 cylinder all V8