Automotive
General Motors teases new 8.3-liter Duramax diesel engine for future trucks
The 'Mongoose' engine is expected to replace the current 6.6-liter V-8 in 2027 heavy-duty models.
The short version
- General Motors released a teaser video for an 8.3-liter V-8 Duramax diesel engine codenamed 'Mongoose'.[Car and Driver · Jalopnik]
- The new engine is scheduled to launch with the 2027 Chevrolet Silverado HD and GMC Sierra HD models.[Car and Driver]
- GM has not yet released output, performance specifications, or towing figures for the new powertrain.[Car and Driver · Jalopnik]
Key facts
- General Motors announced a new 8.3-liter V-8 Duramax diesel engine codenamed 'Mongoose'.[Car and Driver · Jalopnik]
- The engine is planned for release in the 2027 Chevrolet Silverado HD and 2027 GMC Sierra HD truck lines.[Car and Driver]
- The Mongoose is set to replace GM's current 6.6-liter Duramax V-8 engine, which delivers 470 horsepower and 975 pound-feet of torque.[Car and Driver · Jalopnik]
- GM's teaser video references competition against Ford, whose 6.7-liter Power Stroke diesel is internally codenamed 'Scorpion'.[Car and Driver · Jalopnik]
What remains uncertain
- General Motors has not publicly disclosed exact horsepower, torque, towing capacities, or fuel efficiency statistics for the Mongoose engine.[Car and Driver · Jalopnik]
Sources
Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.