AFM/DFM Disabler for GM V6 V8 Engines - Compatible with Chevrolet Silverado, Suburban, and Other GM Vehicles with Active or Dynamic Fuel Management (Cars, Trucks, and SUVs) This AFM/DFM disabler allows your V6 or V8 GM vehicle to operate in full cylinder mode at all times, providing more consistent power delivery and reduced throttle lag. It does not modify the factory ECU program and leaves no trace when removed. Plug-and-play design for easy installation. Simply connect to the OBD port; four indicator lights will flash sequentially and stabilize with one light illuminated when properly connected. Constructed from high-quality materials for reliable performance under extreme temperatures and pressure conditions. Features soft-glow LED bulbs that are not distracting during nighttime driving. Note: Not compatible with 2019 and newer Silverado and Sierra models equipped with 5.3L or 6.2L engines. Not suitable for 2022 refresh model trucks or SUVs. Color: Black Material: Plastic Package Includes: 1 x AFM/DFM Disabler (Other accessories not included) Product labels may vary randomly and cannot be customized. Actual product may differ slightly in appearance or color. Note: Lighting effects and display settings may cause slight color differences between the image and the actual item. Measurement tolerance: ±1-3 cm.