Chevrolet has updated its 2027 Silverado HD lineup, introducing two primary powertrain options. The range now includes an updated 6.6-liter gasoline V8 engine paired with a 10-speed automatic transmission and a new 8.3-liter Duramax turbodiesel engine, internally referred to as Mongoose.
The 8.3-liter Duramax diesel produces 1,230 lb-ft of torque. When configured as a regular cab 3500 dually with the maximum towing package, the truck achieves a gross combined weight rating of 46,500 pounds and can tow gooseneck trailers weighing up to 38,000 pounds.
The updated 6.6-liter gasoline engine, now paired with a 10-speed transmission, demonstrated the ability to tow a 14,000-pound trailer at altitudes near 8,000 feet. The diesel variant provides faster acceleration and includes an exhaust brake feature for improved control on descents.
The 2027 Silverado HD models feature a new independent front suspension and electronic power steering. The interior includes an updated infotainment system with phone mirroring capabilities and standard air conditioning, maintaining core comfort features despite weight-saving measures.
Opting for the 8.3-liter Duramax engine requires an additional investment of $11,400. Owners of the diesel model also face higher operating costs due to fuel prices, mandatory diesel exhaust fluid requirements, and regular fuel filter maintenance.
