GM teases the new ‘Mongoose’ 8.3L Duramax Turbo-Diesel V8 Engine

[gemarsh]

HD's!

That's 506 cubic inches for us old Americans!

https://gmauthority.com/blog/2026/09/gm-confirms-mongoose-8-3l-duramax-turbo-diesel-v8-engine-in-new-teaser-video/?utm_source=gmauthority.beehiiv.com&utm_medium=newsletter&utm_campaign=8-3l-duramax-v8-confirmed-for-2027-silverado-hd-sierra-hd&_bhlid=f2553bd23e181ac567b5f8cafa1dadbb0ca15651

 

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[pigpen23]

 

[Koolbreezeya]

Wow, how big can they go without redesigning the whole truck..

 

[R467X]

But will it have an oil dipstick?

 

[Admin]

New teaser from GM for the ‘Mongoose’ 8.3L Duramax Turbo-Diesel V8 Engine!

 

[TTBadDog]

Unfortunate timing with current diesel fuel prices.