What is DFM on an engine?
Dynamic Fuel Management (DFM), otherwise known as Dynamic Skip Fire, is a General Motors engine technology that shuts down the engine’s cylinders to optimize power delivery and efficiency. DFM is an improvement to Active Fuel Management, which it succeeds.
Can you turn DFM off?
All the time. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders.
What vehicles have DFM?
Popular vehicles where you’ll find AFM/DFM
- Corvette.
- Camaro.
- Tahoe.
- Suburban.
- Silverado.
- Sierra.
- Yukon.
- Equinox.
Did Chevy stop DFM?
The memo released today indicates that this change in the inclusion of AFM/DFM on 5.3L engines will run at least until the end of the 2021 model year. However, with no change in the supply of semiconductors worldwide, this engine change may run into the 2022 model year, GM-Trucks.com speculates.
Which GM engines have DFM?
All GM trucks with 5.3L and 6.2L V-8 engines equipped with 8- and 10-speed transmissions have been fitted with DFM since then. The less-sophisticated Active Fuel Management system that shuts down four cylinders under low-load conditions has been standard on the same engines hitched to 6-speed automatics.
What is 5.3 l EcoTec3 V8 engine with DFM?
5.3L EcoTec3 V8 DFM is a sophisticated system that monitors every movement of the accelerator pedal and calculates the torque needed to handle the current driving situation. Instantaneously, the system activates or deactivates cylinders to maximize fuel economy to create the power needed.
Is DFM the same as AFM?
By 2019, GM had developed Dynamic Fuel Management (DFM) which a smarter version of AFM. While AFM would shut-off the same cylinders every time the system would activate, with DFM, the engine has up to 17 different patterns it can run in depending on load and other inputs.
Does DFM save gas?
DFM in GM engines can shut down any number of cylinders, following 17 different patterns, depending on driving conditions and throttle input. The system helps GM’s OHV 6.2L V-8 achieve a 2-mpg (0.9 km/L) gain in real-world fuel efficiency without sacrificing any of the engine’s 420 hp and 460 lb. -ft.
Do 2021 Silverados have DFM?
As GM Authority recently covered, General Motors is currently building units of the 2021 Chevy Silverado 1500 and 2021 GMC Sierra 1500 light-duty pickup trucks without Active Fuel Management (AFM) or Dynamic Fuel Management (DFM).
Which GM engines do not have AFM?
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| Trim Level | Engine | Fuel Management |
|---|---|---|
| Custom (all other variants) | 5.3L V8 L82 | No AFM |
| Custom Trail Boss | 5.3L V8 L82 | No AFM |
| LT | 5.3L V8 L84 | No DFM |
| RST | 5.3L V8 L84 | No DFM |
Can you get a Silverado without DFM?
No DFM for you, either. The spokesperson added the decision only affects Silverado and Sierra pickups equipped with the 5.3-liter V8 engine. The other V8 engine options, the 6.2-liter V8, will still include the system.