2015 Silverado Engine Options at a Glance
The 2015 Chevrolet Silverado came with a range of engine choices depending on the trim and configuration. The base engine was a 4.3-liter V6, with a 5.3-liter V8 as the most popular upgrade. A 6.2-liter V8 sat at the top of the gasoline lineup, and a 6.6-liter Duramax turbodiesel V8 was available for buyers who needed maximum towing and hauling capability. Each engine paired with a six-speed or eight-speed automatic transmission, and the choice affected payload, towing capacity, and fuel economy.
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| Engine | Type | Horsepower | Torque | Transmission | Fuel |
|---|---|---|---|---|---|
| 4.3L V6 | Naturally aspirated | 285 hp | 305 lb-ft | 6-speed automatic | Gasoline |
| 5.3L V8 | Naturally aspirated | 355 hp | 383 lb-ft | 6-speed automatic | Gasoline |
| 6.2L V8 | Naturally aspirated | 420 hp | 460 lb-ft | 8-speed automatic | Gasoline |
| 6.6L Duramax V8 | Turbodiesel | 397 hp | 765 lb-ft | 6-speed automatic | Diesel |
4.3-Liter V6: The Workhorse Base
The 4.3-liter V6 was the standard engine on the 2015 Silverado. It uses direct injection and variable valve timing to produce 285 horsepower and 305 pound-feet of torque. This engine is well suited for light-duty work and daily driving, and it offers a balance of fuel economy and capability that made it a sensible choice for fleet buyers and those who did not need the full towing capacity of the V8 engines.
5.3-Liter V8: The Popular Sweet Spot
The 5.3-liter V8 has long been a staple of the Silverado lineup, and the 2015 model continued that tradition. With 355 horsepower and 383 pound-feet of torque, this engine provides strong acceleration and a towing capacity that comfortably handles most light- and medium-duty tasks. The 2015 version included variable displacement, which shuts down four cylinders during light-load conditions to improve fuel economy without sacrificing the torque drivers expect from a V8.
6.2-Liter V8: The Performance-Oriented Choice
For buyers who wanted the most power from a gasoline engine, the 6.2-liter V8 delivered 420 horsepower and 460 pound-feet of torque. This engine was paired with an eight-speed automatic transmission, which helped keep highway RPMs low and contributed to a smoother ride. The 6.2-liter option was typically found on higher trims such as the LTZ and High Country, and it gave the Silverado a noticeable edge in both acceleration and payload capability compared with the smaller engines.
6.6-Liter Duramax Turbo-Diesel V8
The 6.6-liter Duramax turbodiesel was the heavyweight option in the 2015 Silverado engine lineup. It produced 397 horsepower and a massive 765 pound-feet of torque, making it the clear choice for heavy towing and hauling. The diesel engine was available in the Silverado 2500HD and 3500HD models, where its low-end torque and fuel efficiency under load gave it a clear advantage over the gasoline V8s for work trucks and trailers that spent a lot of time on the highway.
How to Choose the Right 2015 Silverado Engine
The best engine depends on how the truck will be used. For everyday driving and light-duty tasks, the 4.3-liter V6 provides adequate power and better fuel economy. The 5.3-liter V8 is the most versatile option for buyers who need a blend of towing capacity, payload, and everyday drivability. The 6.2-liter V8 suits those who prioritize performance, while the Duramax diesel is the right pick for maximum towing and long-haul work. Trim level, cab configuration, and bed length also affect which engines are available, so checking the specific model specification is important before deciding.