New Silverado to come with a pair of base engines: an updated variant of the truck’s tried-and-true 4.3-liter V-6 in the current truck and a turbocharged four-cylinder engine, the latter designed to help boost the truck’s overall fuel efficiency. Both engines are expected to utilize General Motors’ eight-speed automatic transmission. Meanwhile, GM’s small-block V-8 will once again serve as the Silverado 1500’s volume engine offering. Like today’s truck, there likely will be two available displacements of the burly bent-eight, while gear changing duties will fall to eight- or 10-speed automatics (the latter co-developed with Ford) depending on the size of the engine.