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$37.08
/ mo
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- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
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Learn more about financing & leasing here.
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Oct 8
Recently Viewed
Features
- Leaves no trace. Unplug it to return to factory settings
- 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 system.
- The power and control you need in any situation.
Description
GM AFM disabler-BLUE
Brand: Range Technology
Power Source: Corded Electric
Operating System: All
Automotive Fit Type: Vehicle Specific Fit
Unit Count: 1 Count
Brand Name: Range Technology
Unit Count: 1 Count
UPC: 860001618600 728505768859
Number of Items: 1
Global Trade Identification Number: 00
Manufacturer: RANGE TECHNOLOGY
Included Components: Main component only
Item Weight: 2.08 ounces
Model Number: RA003B
Manufacturer Part Number: RA003B
Power Source: Corded Electric
Operating System: All
Automotive Fit Type: Vehicle Specific Fit
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Top Amazon Reviews
Purchased this Range Technology AFM disabler for a Tahoe with 5.3L V8. My Tahoe would drop into the 4 Cylinder mode often, very annoying. I have never gotten used to the hesitation when the engine shifts back into the V8 mode in response to my attempt to accelerate, especially from a dead stop. When driving in normal traffic situations the 5.3L FMS constantly put the engine in and out of V8 to V4 and back distracting from the driving experience. Freeway driving was another area where the 5.3L FMS would drop the engine into V4 when my foot came off the pedal or while coasting which is especially annoying while towing a 6500 lbs. RV or when attempting to pass another vehicle. Installing the Range Technology Disabler has solved these problems and I have noticed the vehicle drives much smother. Yes, it cost more than the knockoffs, but I believe it's worth it. My first AFM disabler was a top-rated knockoff brand, cheaper for sure, but I found it didn't work as I thought it should have, it kept the Tahoe's 5.3L in V8 mode but something was missing, it wasn't smooth running like I experience with Range Technology FMS disabler also there was no way to see the lights on the disabler as they were partially covered with the wrap. Remember the old saying "You Only Get What You Pay For" applies here. I am pleasantly surprised with the build quality, ease of installation and the function of the Range Technology device. Only thing I don't like, nothing in the instructions give you a clear understanding of what ALL the light functions indicates but you can go to Range Technology's web site. Also, I have had no issues with the truck's battery SOC and I have seen a slight increase in fuel economy. I do recommend this device.
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Reviewed in the United States on January 21, 2026 by Bernie
No more AFM crap! This completely takes care of the awkward transmission shifts, clunks in the driveshaft when AFM activates, and gives some peace of mind that the cam phasers aren’t going to malfunction in 4 cylinder mode. And this is a lot cheaper than a full camshaft replacement and AFM delete! I’m also getting about 2 more mpg.
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Reviewed in the United States on July 29, 2026 by Cindy Miley
Usually never write reviews… with that being said, this product is THE REAL DEAL! May truck is an 2018 GMC Denali 6.2L V8 with 36k miles on it. Absolutely loving this investment! Just buy it! Yes it’s on the pricey side, but IT WORKS! Money well spent to help protect my Denali from Lifter wear due to the horrible AFM/DFM. And the best part, it leaves no trace of ever being plugged in.
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Reviewed in the United States on September 11, 2026 by Stephen
Used for about 2 weeks.Works as advertised. 2010 Chevy Silverado now runs as V8 at all times , Truck seems to run smother at all times especially noticeable from standing start . Not sure about any changes in MPG. IMPORTANT I take the device out of the OBD port when I am not using the truck as it can drain the battery if left sitting for only a few days only takes 15 seconds to plug unit in when I use the truck
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Reviewed in the United States on June 13, 2026 by Andy
I put this in a 2015 GMC Sierra Denali 5.3 Liter and it indeed runs on 8 cylinders continuously. I use 93 octane gas and get around 17 city and 20-21 highway. I don’t notice battery drain that inhibits starting after being parked for 4-5 days.
Reviewed in the United States on September 4, 2026 by G-Dub
Received quickly, well packaged & easily installed. Will monitor for quality.
Reviewed in the United States on September 23, 2026 by Okieoneshot
I just received Range Technology AFM/DFM disabler and have only driven a couple of times. So far it’s doing what it’s supposed to do but, the reason for 4 stars instead of 5 is because I haven’t used it long enough to see what problems might come up. I will update sometime down the road. I did a lot of research before ordering this and Range Technology had the biggest pluses. I do know that I don’t get that little hesitation when the truck shifts back and forth between 4 and 8 cylinders which was a lot as I live in the rolling plains of south central Texas. I got this unit because of problems I’m seeing all over the internet about AFM systems and the problems that occur after 100,000 miles. I have a 2016 Chevy Silverado 1500 with a 5.3L V8 that I’ve, last year, already had to replace the transmission and I’ve kept up with regular maintenance. My truck’s engine is still running well at 97,000+ mileage and I wanted to head off any problems before they happen. The only problem I’m having with this is that it plugs into the OBD-II port that my AMP Research power running boards plug into so it’s a constant switch back and forth between devices and as noted on the unit box. So, with that being said, I’ve just placed an order for AMP Research OBD-II splitter so I can leave my power running boards plugged in. Also, it will deplete your vehicle’s battery if left plugged in if you don’t drive you vehicle for long periods. Lately, I only drive once or twice a week and have had to unplug my running boards also because of battery depletion.
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Reviewed in the United States on August 24, 2026 by Peggy F.
I've had this for a couple of months now in my 2020 sierra 6.2 10 speed. It seems to take about 5 minutes to disable the dfm if I'm at lower speeds like 30 mph but if I get straight to highway speed it works immediately and once it cuts the dfm out it stays off until the next start up. The auto start is disabled and I haven't had any problems with it. I drive my truck every day so I don't have any problems with the battery being drained. Overall I'm happy I just wish it cut the dfm out immediately every time.
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Reviewed in the United States on June 30, 2026 by Daniel