Is The 8.3L Duramax ‘MegaMax’ Hiding In New Silverado HD, Sierra HD Prototypes?

[securityguy]

https://gmauthority.com/blog/2025/07/is-the-8-3l-duramax-megamax-hiding-in-new-silverado-hd-sierra-hd-prototypes/

 

[NullNomad]

 

[wutang61]

Would still love a proper gas big block in the HD’s. Modern 8.1?

Sign me up.

 

[securityguy]

Would still love a proper gas big block in the HD’s. Modern 8.1?

Sign me up.

I would do this versus another diesel if made available.