AFM/DFM Disable Device for GM V8/V6 engines vs AFM/DFM disabler for Silverado/Sierra 2007-2022 (Plug & Play, black)
Overall winner: AFM/DFM disabler for Silverado/Sierra 2007-2022 (Plug & Play, black)
Key Differences
Genapendex A is the more affordable, plug-&-play AFM/DFM disabler with an auto-off feature and a higher average rating from fewer reviews; OBDDFM B is pricier, also non-invasive and keeps V8 mode active but has more reports of shift accuracy issues and possible check-engine lights
AFM/DFM Disable Device for GM V8/V6 engines
OBDII plug-in device to disable AFM/DFM on most GM V6/V8 engines. Enables constant cylinder mode and simple installation; customers note smooth operation and value for money
Pros
- simple plug-in installation
- keeps V8 mode active
- non-invasive, does not reprogram ECU
- unplug to restore factory settings
Cons
- mixed feedback on shift accuracy
- check engine light may appear according to some users
- verify model compatibility before purchase
AFM/DFM disabler for Silverado/Sierra 2007-2022 (Plug & Play, black)
Plug & play AFM/DFM disabler for Silverado/Sierra; prevents lifter damage and engine noise, with auto-off feature. Customers report improved pedal response and smoother shifting
Pros
- prevents lifter damage from AFM/DFM
- plug & play—no wiring or tools required
- auto-off feature
- improves pedal response
Cons
- no programming required noted; compatibility not guaranteed for all models
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | Genapendex |
| Durability | Tie |
| Versatility | OBDDFM |
| User Reviews | Genapendex |