CHEERCODE AFM/DFM Disabler OBD2 Plug-In
Product description
The OBD2 plug-in design is the main appeal of the CHEERCODE AFM/DFM Disabler: it is intended to stop cylinder deactivation without tools, wiring, or an ECU flash. Plug it into the vehicle’s OBD2 port, and the device disables AFM/DFM so the engine keeps all cylinders active rather than switching between V8 and V4 operation.
That makes it a focused add-on for drivers who want to avoid the roughness or power lag they associate with cylinder-deactivation mode. It is not a fix for unrelated engine problems, and fitment is specific.
Best use cases
This device is aimed at selected GM trucks and SUVs with AFM/DFM-equipped engines. Listed applications include Chevy Silverado and GMC Sierra 1500 models, along with vehicles such as the Tahoe, Suburban, Avalanche, Yukon, Yukon XL, Escalade, and select Buick models. Engine coverage includes 5.3L and 6.2L V8s, plus 3.6L applications where equipped.
A practical use case is a highway merge or tow where you would rather have the engine stay in V8 mode than cycle into a four-cylinder mode. The device is also designed for everyday driving, but it only addresses that cylinder-deactivation behavior, it should not be treated as a substitute for diagnosing a shake, vibration, or loss of power that has another cause.
Product specs
- Type: AFM/DFM disabler
- Format: OBD2 plug-in
- Installation: No tools or wiring required, no ECU modification or software flash
- Coverage: Selected 2007–2024 GM vehicles with compatible engines
- Warranty: 2 years
The maker describes the operation as non-invasive and says factory settings are left untouched. That is a different approach from a tune or software flash, which changes vehicle programming. Here, the stated function is narrower: prevent repeated V4/V8 switching. Compatibility is the key trade-off. It does not fit 2019-and-newer 10-speed Silverado/Sierra models or 2022-and-newer refreshed GM models. If the vehicle’s exact configuration is unclear, confirm fitment before ordering, without that measurement, the broad year range alone is not enough to establish compatibility.
Where it shines
The straightforward plug-in format suits owners who want to avoid a tool-based installation or changes to the ECU. In a typical setup, you locate the OBD2 port, insert the device, and leave it in place while driving, there is no wiring step described. Keeping all cylinders active may help avoid the feel of mode switching, which is the main reason to consider this type of device.
The description also says preventing repeated cycling may help reduce oil consumption and wear associated with AFM/DFM operation. Treat that as a potential benefit, not a guaranteed result: no measured savings or engine-life figures are provided. The included 2-year warranty adds a defined period of coverage, though warranty terms are not detailed here.
When it makes sense
Worth considering if your vehicle is one of the listed compatible configurations and you want a simple way to disable cylinder deactivation without a tune. The clearest reason to choose it over leaving the factory system alone is a preference for continuous V8 operation and a dislike of the switching feel.
Better avoided if your Silverado or Sierra has one of the excluded configurations, or if you expect a plug-in device to resolve a vibration that has not been traced to AFM/DFM. The fitment range is broad, but not universal, so the vehicle’s year and setup matter more than the model name alone. Buy it when compatibility is confirmed and cylinder-deactivation behavior is the specific concern, skip it when either point is uncertain.