TOPDON AFM/DFM Disabler — Restore Your Engine's Full Potential Tired of the rough idle, jerky acceleration, and premature lifter wear caused by Active Fuel Management (AFM) or Dynamic Fuel Management (DFM)? The TOPDON AFM/DFM Disabler is a non-intrusive, plug-and-play solution that keeps your GM V6 or V8 engine running in full-cylinder mode at all times—no ECU mod, and no permanent modifications. Simply plug the device into your vehicle's OBD-II port. It communicates directly with your factory ECU to prevent cylinder deactivation, eliminating the annoying V4-mode transition. Enjoy smoother throttle response, consistent power delivery, and improved towing stability from the moment you start your engine. When unplugged, your vehicle instantly returns to stock AFM/DFM behavior—completely reversible and coverage-friendly. Comprehensive Vehicle Coverage Engineered for broad compatibility across GM's AFM/DFM-equipped lineup, this disabler supports popular models including the Chevrolet Silverado 1500, Suburban, Tahoe, Camaro, Colorado, Corvette, Avalanche, Blazer, Trailblazer, Impala, Malibu, Equinox, Traverse, Caprice, SS, and Monte Carlo; GMC Sierra 1500, Sierra Denali, Yukon, Yukon Denali, Canyon, Envoy, and Acadia; Escalade, ATS, CTS, CT6, SRX, STS, and XT5; plus Buick Enclave, Lacrosse, Rainier, Rendezvous, and Terraza. Additional supported vehicles include Pontiac G6, G8, Grand Prix, and Torrent; Holden Commodore, Statesman, and Ute variants; SAAB 9-7X and Aura; Saturn Outlook, Vue, and Relay; Isuzu Ascender; and Suzuki XL7. Coverage spans model years 2005 through 2025 with engine options ranging from 3.0L, 3.6L, 3.9L, 4.3L, 5.3L, 6.0L, and 6.2L V6/V8 powerplants. Smart Power Management & NFC Convenience Unlike basic disablers that constantly drain your battery, our device features an intelligent sleep/wake system. It automatically enters ultra-low-power hibernation (≤2mA) when your vehicle is off and wakes instantly at startup (operating current ≤10mA). The built-in NFC tag allows you to tap your smartphone to access an H5 compatibility guide and quick-start instructions. Dual-color LED indicators provide at-a-glance status confirmation: green for power-on and blue for active disabler operation. Protect Your Investment By blocking AFM/DFM cylinder shutoff, this device helps prevent the collapsed lifters, excessive oil consumption, and carbon buildup issues that plague many GM owners. Avoid costly four-figure engine repairs and keep your truck or SUV running the way it was originally designed—smooth, powerful, and reliable. What's in the Box 1x TOPDON AFM/DFM Disabler 1x User Guide Note: This product does not mod your vehicle's ECU software.