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AFM/DFM disablers for the Tahoe, Suburban & Yukon 2021–2024

Cheap classic disablers won't work. Only modules built for Global B (Range RA007, BOOST DFM and a few others) are sold for it.

By KeepOnEight editorial teamUpdated We earn from qualifying Amazon purchases · how we review

Short answer

For most Tahoe & Yukon2021–2024 owners: Range Technology RA007 DFM Disabler, or BOOST DFM Disabler (Global B) on a budget: CheerCode AFM DFM Disabler (V6/V8). Check your engine and transmission in the table first.

Engines, years and what they have

EngineGM codeYearsTransmissionSystem
5.3L V8L842021–20248/10-speedDFM
6.2L V8L872021–20248/10-speedDFM
3.0L Duramax dieselLM22021–2024—None
  • These SUVs moved to Global B electronics a year before the pickups: only modules built for Global B work.
  • 6.2L L87 owners: the 2025 engine recall (25V-274) concerns crankshaft and rod bearings, not lifters.

Disablers sold for this generation

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2022.5+ trucks · 2021+ SUVs

Range Technology RA007 DFM Disabler

4.4★ (364 ratings) · 1K+ bought last month

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 →
2022.5–2026 trucks · 2021–2024 SUVs

BOOST DFM Disabler (Global B)

4.1★ (299 ratings) · 800+ bought last month

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 →
2007–2022.0 · 10-speed disputed

CheerCode AFM DFM Disabler (V6/V8)

New listing · 500+ bought last month

Draw not stated No switch Start/stop stays

New and priced like a premium unit with a generic's fitment claims: we'd wait.

About $120
on Oct 27, 2026 Check on Amazon →

4 disablers in total are sold for at least one engine of this generation. See them all in the comparison table, or add your vehicle for an exact answer.

Limits & caveats

  • Unplug the module before any GM over-the-air update or dealer software update.
  • California: the Range RA007 has a CARB Executive Order (D-115-32) for 2021–2024 models, so it is 50-state legal on this vehicle. The other disablers listed have none and are not legal on California-registered vehicles.
  • Plug-in disablers draw a little current with the engine off. If the vehicle will sit for a week or more, unplug it or use a model with a switch.
  • Some 2024–2026 owners report that cylinder deactivation still kicks in with a module plugged in. Keep the receipt and test it in the return window.

Where it plugs in

Not every Global B module goes in the same place. The Range RA007 connects inline at the engine computer under the hood (two factory connectors), not at the OBD-II port; follow the maker's instructions. Other modules use the OBD-II port: under the dash, left of the steering column, above the driver's knee.

Questions owners ask

Does the Tahoe & Yukon 2021–2024 have AFM or DFM?

5.3L V8 (L84, 2021–2024): DFM. 6.2L V8 (L87, 2021–2024): DFM. 3.0L Duramax diesel: none.

Where is the OBD-II port?

Under the dash, left of the steering column, above the driver's knee.

Will a cheap $40–70 disabler work?

No. Those are built for the older electronics. Since the switch to Global B, only dedicated modules such as the Range RA007 and BOOST DFM are sold for these vehicles.

Sources: GM service bulletin 20-NA-038 (engines with AFM/DFM hardware), manufacturer fitment pages (Range Technology, BOOST), Amazon listings and owner reviews, owner forums. Checked October 27, 2026. How we review.