General Motors is teasing a new Duramax diesel engine: an 8.3-liter V8 turbodiesel that GM calls “Mongoose.” The announcement is tied to upcoming heavy-duty truck updates, according to the outlets reporting on GM’s messaging.
Carscoops and Car and Driver both describe the engine as planned for GM’s 2027 Silverado HD and Sierra HD models. While the core specifications and nickname are consistent across the reports, the outlets differ slightly in framing. Car and Driver emphasizes that GM’s marketing also draws contrasts with rival diesel offerings from Ford. Carscoops likewise highlights GM’s competitive wordplay, saying the “Mongoose” name is intended to counter Ford’s “Scorpion” branding.
Taken together, the reporting indicates GM is using the “Mongoose” name as part of a broader push for its next heavy-duty diesel, while leaning into a rivalry-themed marketing approach toward competitors’ analogous branding.
