Carbyte AFM/DFM & Start/Stop Disabler for GM Trucks SUVs Cars (2005–2024, OBD-II Plug-In, Full‑Time V8)

Carbyte is a plug-and-play device that permanently disables AFM/DFM cylinder deactivation and the automatic Start/Stop system on supported 2005–2024 GM vehicles and select 2025 models, or lets you control these features from your phone.

Many GM owners want the smooth, consistent power and predictable behavior of a full-time V8 without the interruptions of cylinder deactivation or the engine cutting out at stops. Carbyte addresses that by offering a simple OBD-II plug-in that forces Full-Time V8 Mode, blocks Auto Start/Stop, and optionally pairs with a smartphone app to toggle settings or restore factory behavior when needed. Installation requires no mechanical changes — just connect to the OBD-II port and the unit handles the rest.

How does Carbyte stop AFM/DFM and keep the engine on all cylinders?

Carbyte intercepts the vehicle’s messages to the powertrain control system and maintains commands that keep all cylinders active. The device operates in a dedicated Full-Time V8 mode so the engine runs without cylinder deactivation interruptions.

• Disables AFM/DFM in Full-Time V8 Mode
• Maintains continuous cylinder firing for smoother power delivery
• No engine bay installation — uses OBD-II port only

Will the Start/Stop eliminator affect fuel economy or vehicle electronics?

Carbyte prevents the engine from shutting off at stops by blocking the Auto Start/Stop feature, while leaving other vehicle systems unchanged. It is designed to communicate safely with the vehicle’s computer without reprogramming or altering permanent settings.

• Blocks Auto Start/Stop signals to keep the engine running
• Preserves existing vehicle electronics and fault codes
• No permanent ECU flash or wiring splices required

How easy is installation and do I need an app to use it?

Installation is quick and noninvasive: plug Carbyte into the OBD-II port and it begins working immediately. The AFM/DFM and Start/Stop disabler functions run without any app, but an optional smartphone app is included for on-the-fly control and to temporarily revert to factory operation.

• Plug-and-play — no tools or mechanic required
• Works standalone; optional app gives remote control
• Safe removal returns the vehicle to stock behavior

Which GM vehicles are compatible with this device?

Carbyte supports a broad range of GM trucks, SUVs and cars from 2005 through 2024 and select 2025 models, including many with 10-speed transmissions. Always check the supported-vehicles list before purchase to confirm compatibility for your exact year and trim.

• Fits many 2005–2024 GM trucks, SUVs, and cars
• Compatible with a number of 2022–2025 truck and SUV models
• Works with vehicles equipped with 10-speed transmissions (see list)

Who is this for: Carbyte is aimed at GM owners who prefer uninterrupted engine operation and more consistent throttle response — drivers frustrated by cylinder deactivation surging or the engine cutting out at traffic lights. It suits owners who want a reversible, noninvasive solution that installs in minutes and can be controlled from a phone, plus those who need a quick way to return to factory settings for service or resale. If you want a plug-and-play method to disable AFM/DFM and Start/Stop without altering the ECU, Carbyte offers a practical, user-friendly option.