Vehicle Applications: AFM, Start-Stop & TPMS By Make
Cylinder deactivation, automatic start-stop and tire pressure monitoring are not the same system in every vehicle, and they are rarely implemented the same way twice. General Motors calls its deactivation system AFM on one family of engines and DFM on another. Chrysler calls its version MDS. Honda calls its VCM. A Chevrolet and a GMC built on the same platform can carry different tire pressure sensors, different connectors and a different number of them.
That is why Recontrol-X organises its vehicle information by make first. The make decides which systems the vehicle was built with. The model and the model year decide which version of each system it received. Each vehicle page below covers the systems fitted to that vehicle, the years they were used in, and the modules that apply to them.
Choose your vehicle
Chevrolet
Silverado, Tahoe and the rest of the Chevrolet line carry the widest spread of these systems in the catalogue: AFM and DFM on the V6 and V8 trucks and crossovers, direct TPMS from 2007, and automatic start-stop on the later four-cylinder models. Start with Chevrolet AFM and DFM modules, Chevrolet start-stop eliminators or Chevrolet TPMS sensor emulators.
GMC
GMC shares its platform with Chevrolet but not its fitment table. Sierra and Yukon use the same generation of deactivation hardware with different connectors, and the TPMS emulators are listed as separate GMC applications even where the mounting matches the Chevrolet equivalent. See GMC AFM and DFM modules, GMC start-stop eliminators and GMC TPMS sensor emulators.
Ford
Ford trucks and SUVs rarely carry GM-style cylinder deactivation. What they do carry is tire pressure monitoring, battery monitor registration after a battery change, and start-stop systems whose switch location and interface moved between model years. See Ford start-stop eliminators and Ford TPMS sensor emulators.
Honda
Honda's cylinder management system is VCM, and the switch point is the ECT1 temperature sensor circuit rather than an OBD2 port. Odyssey and Pilot are listed separately because the harness differs between them. See Honda VCM modules and Honda start-stop eliminators.
Toyota
Toyota's tire pressure monitoring is handled by the vehicle itself: it reports a low-pressure condition and most models relearn through the instrument cluster after a rotation or a tire change. Start-stop is the system Recontrol-X covers for Toyota. See Toyota start-stop eliminators.
RAM
RAM trucks cover two separate stories: the TPMS reset button and relearn sequence, which changes by model year, and the 5.7 HEMI's multi-displacement system, which is Chrysler's version of cylinder deactivation. See RAM start-stop eliminators.
Year, make and model is not enough on its own
Two vehicles with the same badge and the same model year can carry different engines. General Motors replaced the entire 5.3 litre engine between 2013 and 2014 and moved the 6.2 from the L94 to the L86 inside a single decade, without renaming a single body style. Honda fitted cylinder management across its range progressively rather than all at once. Any fitment list that spans those years has to name the engine, or it is describing two different trucks.
The identifiers that settle it are the engine code on the Service Parts Identification sticker, the same code stamped on the engine block, the model year from the tenth character of the VIN, and the trim from the badging. The vehicle compatibility guide covers how to read each one, and why displacement on its own never confirms a fitment.
Vehicle, system and module
These are published applications, listed as year, make, model and the system each module addresses. A vehicle outside this table is not necessarily unsupported; it means the combination has not been published yet.
| Vehicle | System addressed | Module |
|---|---|---|
| 2007-2018 Chevrolet Silverado 1500 (5.3L / 6.0L / 4.3L / 4.0L) | AFM and DFM cylinder deactivation | Silverado 1500 AFM/DFM disabler |
| 2019-2024 Chevrolet Equinox | Automatic start-stop | Equinox start-stop eliminator |
| RAM 1500 | Automatic start-stop | RAM 1500 gateway memory harness |
| 2009-2026 Honda Pilot | VCM cylinder management | Honda Pilot VCM disabler harness |
| 2008-2016 GMC Sierra 1500 | Tire pressure monitoring | GMC Sierra 1500 TPMS emulator |
| 2007-2016 Chevrolet Silverado 2500 | Tire pressure monitoring | Silverado 2500 TPMS emulator |
Start with the system instead of the vehicle
If you know which function you want to change rather than which vehicle you own, each system is covered in depth on its own: AFM, DFM and VCM cylinder management, automatic start-stop systems, and TPMS and vehicle monitoring. Fitting and first checks are covered in the installation guide, and separating a module fault from a sensor or wiring fault is covered in the troubleshooting centre.
Questions that come up across vehicles
Does my vehicle actually have cylinder deactivation?
Check the engine code against the model year rather than assuming. On General Motors trucks the 5.3 litre engine is built with AFM or DFM depending on the code, some V6 applications carry no deactivation at all, and a small number of vehicles were built with the hardware but without a calibration that uses it. The four-cylinder or three-cylinder running state on the dash during normal driving is the confirmation that the system is active.
Why do two identical model years show different modules?
Because manufacturers change hardware mid-platform and rarely change the body name when they do. The engine swap between 2013 and 2014 on the 5.3 litre is the clearest example: same badge, same body, different engine, different module.
Can a module from one brand be used on another?
No. The module talks to the vehicle's own protocol through a connector that brand alone, and the tire pressure sensor markets do not mix between them. What transfers between brands is the method, not the part.
Why does a make page and a vehicle page list different modules?
A make page groups everything built for that manufacturer, including applications that fall outside the vehicle pages. A vehicle page covers the systems fitted to one vehicle application, including the systems we do not sell a module for, which is why it will mention tire pressure monitoring on a Toyota where the answer is that the vehicle handles it itself.