[Martinjlm]

Originally Posted by az4783054

GM calls cylinder deactivation DFM for it's newer production 5.3L and 6.2L vehicles now. Some early (conflicting) articles said the ZL1 Camaro A10 has the DFM.

Quote: "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."


Adding to the confusion, RANGE TECHNOLOGY says their module will work with the DFM in 2020 camaro with 6.2L but doesn't actually specify ZL1/LT4/A10.


Here's an article on DFM...
https://www.enginelabs.com/engine-te...el-management/

There are two types of cylinder deactivation currently being used in GM vehicles.

• Active Fuel Management (AFM)
• Dynamic Fuel Management (DFM)

AFM deactivates the same 4 cylinders (2 for the 3.6L). It’s the system used on Camaro, Corvette, and 2018 and earlier GM trucks and 2020 utilities and a bunch of other vehicles.

DFM is a completely different animal. So far it is only used on V8 engines on some 2019 and newer Silverados and Sierras and will also be offered on the Tahoe and Yukon. It can deactivate as many as 7 cylinders at a time, depending on situation and conditions. From my understanding of it, each cylinder makes a “fire or not” decision on every engine cycle.