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L8S 6.6L V-8

C/K Man

By C/K Man
August 21, 2025 in 6.6L Gas V8 (L8T)

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C/K Man

Enthusiast

C/K Man

Posted August 21, 2025

Posted August 21, 2025 (edited)

Any more news on the upcoming L8S? Will it be used in the 2028 HD's or is it the new 6.6L rumored for the 1500's in 2027?

Edited August 22, 2025 by C/K Man

Senior Enthusiast

newdude

Posted August 21, 2025

Posted August 21, 2025

I haven't heard/seen diddly squat on V8 changes other than all the investment news the last year or so for Gen 6.

C/K Man

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C/K Man

Posted August 22, 2025

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Posted August 22, 2025 (edited)

Sorry, should have said for 2027. I have heard rumors the Gen. 6 for the 1500's and SUV's will be in the form of a 5.7L and a 6.6L.

Edited August 22, 2025 by C/K Man

9 months later...

C/K Man

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C/K Man

Posted May 24

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Posted May 24

https://gmauthority.com/blog/2026/05/is-this-gmc-sierra-hd-prototype-testing-a-new-gm-gas-engine-for-heavy-duty-trucks/

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