Chevrolet has released engine details on the 2019 Silverado, revealing a new turbocharged four-cylinder, a first in the half-ton segment. 

Power output from the new 2.7-liter turbo four is rated at 310 horsepower and 348 lb-ft of torque, a decent step over the naturally aspirated 4.3-liter V6 that will continue to act as the base engine, making 285 hp and 305 lb-ft of torque.

Customers who want the small turbo can have it standard on LT and RST models.

Standard on LT Trail Boss and available on the LT and RST is a 5.3-liter V8 with the unchanged power numbers, making 355 hp and 383 lb-ft of torque. An even bigger V8 displacing 6.2-liters is available with the LTZ and High Country trims, offering 420 hp and 460 lb-ft of torque.

An all-new 3.0-liter inline six-cylinder turbodiesel will also become available in early 2019 on LT and higher trim trucks. Power numbers on the diesel are still unannounced.

READ MORE: 2019 Chevrolet Silverado Order Guide Surfaces With Plenty of Details

A six-speed automatic transmission can be paired to both the 4.3-liter V6 and 5.3-liter V8 in basic models, while an eight-speed automatic is called upon for the 5.3-liter in higher trim trucks. Both the 6.2-liter V8 and new diesel will be paired exclusively to a 10-speed automatic transmission.

Chevy expects this truck to be more fuel efficient than the previous Silverado thanks to improvement in aerodynamics and a weight loss of about 450 pounds on average. Other fuel-saving tricks include active grille shutters and active cylinder management that can shut down anywhere from one to seven cylinders.

Production of new crew cab V8 models will begin in the third quarter of 2018, while the fourth quarter will see production expand to regular- and double-cab models with V6s and 2.7-liter turbos.