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ShinerBock's avatar
ShinerBock
Explorer
Jan 25, 2018

2019 GM trucks get smarter fuel-saving cylinder deactivation

Interesting bit of tech in the new GM V8s to increase fuel economy. These definitely aren't your traditional V8s with all of the added moving parts and computers needed to operate them. It is al...
Tow Vehicles
ShinerBock's avatar
ShinerBock
Explorer
Jan 25, 2018
BB_TX wrote:
Don't know what the difference is but a good friend's 2017 GMC Denali SUV has that feature. Or at least similar. I think it deactivates two cylinders when cruising at highway speeds and not under any undue load. I can not tell when it changes back and forth when I ride with him.



The difference between this system and the current one your friend has that the new system can deactivate any cylinder at any time depending on load requirements rather than just four cylinders.

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