Range Technology RA007 DFM Disabler

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What it's sold for

Range lists every 2023–2026 Silverado/Sierra 1500 and every 2021–2026 Tahoe, Suburban, Yukon and Escalade with the 5.3L or 6.2L, plus 2022 refresh trucks (VIN 12th digit 5 or higher). It connects inline at the engine computer (two factory connectors), not at the OBD-II port, and it is the only disabler we found with a CARB Executive Order: D-115-32, 50-state legal on 2021–2024 models, 2025–2026 pending.

"Maker lists it" = the manufacturer names the vehicle; "Listing claims it" = only the Amazon listing's generic claim; "Sources disagree" = conflicting claims or owner reports. Use the fit finder for your exact engine and year.

Specs that matter

What owners report

Our summary of recent owner reviews (we read the critical ones first). We don't test units ourselves.

Likes

• Holds the engine on all eight cylinders on most trucks
• Also shuts off auto start/stop
• Backed by Holley, the company that owns Range

Complaints

• Check-engine lights on some trucks and Escalades, sometimes with codes a scan tool could not clear
• Several 2024–2025 owners say cylinder deactivation still happens
• Must come out before a GM over-the-air update or a dealer visit
• A few owners found it hard to reach the right connector on their truck

Who it's for

Best suited to owners of 2022.5–2026 Silverado/Sierra 1500 and 2021+ Tahoe, Suburban, Yukon or Escalade with the 5.3L or 6.2L.

Not for

• Pre-refresh trucks (2007–2022.0): get a classic disabler instead
• Heavy-duty 2500/3500 trucks: no AFM/DFM to disable
• California-registered vehicles

Alternatives