BOOST AFM & DFM Disabler
0.71 mA engine off No switch Start/stop stays
Our favorite classic disabler on paper: well rated, low stated draw, clear fitment list.
About $149
on Oct 27, 2026 Check on Amazon →
on Oct 27, 2026 Check on Amazon →
Independent · 35 disablers tracked
Find the AFM/DFM disabler that actually works on your truck.
Year alone doesn't decide it. The engine, the transmission and GM's 2022 electronics change do. Pick your vehicle and get a straight answer, limits included.
- Every plug-in disabler selling 100+ a month on Amazon, checked against your vehicle
- What owners report: battery drain, warning lights, mpg, start/stop
- No bench tests, no hype: every verdict links its source
Which disabler fits my vehicle?
Pick your vehicle. We'll tell you if it has AFM or DFM and which plug-in disablers are sold for it.
Your vehicle isn't listed? Crossovers like the Traverse, Acadia and Equinox aren't covered yet: we couldn't confirm which years have cylinder deactivation.
Photo: Unsplash
35Disablers tracked
21GM generations mapped
100+ sold a month to be listed
2026Up to model year
Short answer
Our picks, by generation
Classic disablers fit AFM vehicles and pre-refresh trucks. 2022.5+ trucks and 2021+ SUVs need a Global B module.
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2007–2022.0 (classic AFM/DFM)
Range Technology RA003B AFM/DFM Disabler
Draw not stated No switch Kills start/stop
The best-known classic disabler. You pay about three times a clone for the brand and the support.
About $215
on Oct 27, 2026 Check on Amazon →
on Oct 27, 2026 Check on Amazon →
Genapendex AFM/DFM Disabler
Draw not stated No switch Start/stop stays
A budget pick that at least claims a sleep mode for long parking.
About $55
on Oct 27, 2026 Check on Amazon →
on Oct 27, 2026 Check on Amazon →
Best AFM disablers, compared →
2022.5–2026 trucks · 2021+ SUVs (Global B)
Range Technology RA007 DFM Disabler
Draw not stated No switch Kills start/stop
The reference module for 2022.5+ trucks and 2021+ SUVs: the only one with a CARB exemption (2021–2024 models), and it also turns off auto start/stop.
About $231
on Oct 27, 2026 Check on Amazon →
on Oct 27, 2026 Check on Amazon →
BOOST DFM Disabler (Global B)
0.1 mA engine off No switch Start/stop stays
The lower-cost Global B option with the smallest battery draw, if you can live with auto start/stop.
About $149
on Oct 27, 2026 Check on Amazon →
on Oct 27, 2026 Check on Amazon →
By vehicle
Pick your generation
What fits changes with the body generation, so that's how our guides are organized.
Classic AFM/DFMSilverado 1500 & Sierra 1500 2007–20135.3L V8 AFM · 6.0L V8 Hybrid AFMClassic AFM/DFMSilverado 1500 & Sierra 1500 2014–20185.3L V8 AFM · 6.2L V8 AFM · 4.3L V6 AFM · 5.3L V8 eAssist AFMClassic AFM/DFMSilverado 1500 & Sierra 1500 2019–2022.05.3L V8 AFM · 5.3L V8 DFM · 6.2L V8 DFM · 4.3L V6 AFMGlobal B · dedicated moduleSilverado 1500 & Sierra 1500 2022.5–20265.3L V8 DFM · 6.2L V8 DFMClassic AFM/DFMTahoe, Suburban & Yukon 2007–20145.3L V8 AFM · 6.2L V8 AFM · 6.0L V8 Hybrid AFMClassic AFM/DFMTahoe, Suburban & Yukon 2015–20205.3L V8 AFM · 6.2L V8 AFMGlobal B · dedicated moduleTahoe, Suburban & Yukon 2021–20245.3L V8 DFM · 6.2L V8 DFMClassic AFM/DFMCadillac Escalade & Escalade ESV 2015–20206.2L V8 AFM
Before you buy
The questions that matter
Does my truck have AFM or DFM?Engine code, VIN, the YK9 sticker: check in two minutes. 2022.5 refresh & the 10-speedWhy half of all returns happen: the electronics changed. Lifter failure: $1,800–$6,500What fails, the warning signs, and what a disabler can't promise. Battery drainStated draw by model, and when to unplug.
Questions owners ask
Do AFM disablers work on every GM V8?
No. Classic plug-in disablers are built for AFM engines (about 2007–2021) and pre-2022 DFM trucks with a 6- or 8-speed. 2022.5+ trucks and 2021+ SUVs use newer "Global B" electronics and need a dedicated module. Heavy-duty 2500/3500 trucks have no AFM at all.
Will a disabler stop lifter failure?
It cuts the number of times the lifters switch on and off, which is why owners buy one. But no independent study shows it prevents failures, and some lifter failures have nothing to do with AFM. Treat it as risk reduction, not a guarantee.
Will I lose fuel economy?
Usually a little. Owners and tests report 0 to 3 mpg less, mostly on the highway where cylinder deactivation saved the most.
Is a disabler legal?
Makers sell them under the EPA's 2020 tampering policy. In California, only one we track has a CARB Executive Order: the Range RA007 (D-115-32) for 2021–2024 Global B vehicles. The others are not legal on California-registered vehicles. Several states inspect cars through the OBD-II port. We report the facts; we don't give legal advice.