Carbyte AFM/DFM Disabler & Start/Stop Eliminator — GM 2005–2024 & Select 2025, OBD-II Plug-In, App Option

Carbyte is a plug-and-play module that disables GM AFM/DFM cylinder deactivation and the Auto Start/Stop system, keeping your engine firing on all cylinders and running continuously when activated.

Designed for a broad range of GM vehicles from 2005 through 2024 and select 2025 models (including many 10-speed transmissions), Carbyte removes the interruptions created by cylinder deactivation and engine shutoffs. It installs in seconds via the OBD-II port for a noninvasive way to restore consistent power delivery and eliminate start/stop cycling. An optional smartphone app provides on-the-fly control, but core AFM/DFM and Start/Stop disabling are available without any app required.

How does Carbyte stop AFM/DFM cylinder deactivation?

When you select Full-Time V8 Mode, Carbyte prevents the engine management system from entering cylinder deactivation. That means the powertrain runs with all cylinders active, improving throttle response and smoothing power delivery under many driving conditions. This is achieved through a targeted signal modification rather than mechanical changes to the engine.

• Full-Time V8 Mode keeps all cylinders firing at all times
• No engine hardware modification needed
• Compatible with many 10-speed transmissions on supported GM vehicles
• Reversible by unplugging the device or via the app

Can Carbyte eliminate the Auto Start/Stop feature?

Yes — Carbyte offers a Start/Stop Disabler that prevents the engine from shutting off when the vehicle stops. This keeps the engine running continuously, which can remove restarts that many drivers find intrusive. The function works immediately after installation and does not require wiring changes.

• Disables factory Start/Stop so engine remains on at stops
• Works without altering vehicle warranties through OBD-II plug-in
• Instant activation after plugging into the OBD port
• Option to return to factory behavior quickly via app or device removal

Is installation really plug-and-play and app-free?

Absolutely — Carbyte provides stand-alone operation straight from the OBD-II port with no app necessary for AFM/DFM and Start/Stop disabling. The optional smartphone app is included for users who want convenient mode switching from their phone and a fast way to restore factory settings. Installation requires no special tools and no work under the hood.

• Plug into the vehicle OBD-II port; no splicing or wiring
• No tools required and no mechanical risk to engine components
• Optional app for remote control and temporary reversion to stock
• Immediate effect after connection; unplug to remove

Who is this for? Carbyte is aimed at GM owners who want a smoother, uninterrupted driving feel: commuters tired of frequent engine stops, drivers who prefer consistent V8 performance, and tuners who need a reversible, low-risk way to neutralize AFM/DFM and Start/Stop systems. It’s ideal for fleet vehicles, off-road rigs, or anyone seeking instant, noninvasive control over cylinder deactivation and automatic shutdown features without permanent vehicle modifications.