The Suburban is not defined by a single engine type. For modern model years, Chevrolet offers gasoline V8 engines and a diesel inline-six; there is no current gasoline V6 option. In practice, you’ll find two V8 options and a 3.0-liter Duramax turbo-diesel inline-six, all paired with a 10‑speed automatic transmission.
Current powertrain options
The Suburban’s engine lineup centers on two gasoline V8 options and a turbo-diesel inline-six. The following is a concise guide to what’s available today.
- 5.3L V8 gasoline — 355 horsepower and 383 lb-ft of torque; 10-speed automatic transmission; widely available across many trims; often includes cylinder deactivation technology for efficiency.
- 6.2L V8 gasoline — 420 horsepower and 468 lb-ft of torque; 10-speed automatic transmission; strongest gasoline option for towing and high-load use.
- 3.0L Duramax turbo-diesel inline-six — about 277 horsepower and 460 lb-ft of torque; 10-speed automatic transmission; valued for high low-end torque and improved highway fuel economy.
All current powertrains use a 10-speed automatic transmission, delivering a balance of smooth shifts, performance, and efficiency. The choice among them affects acceleration, towing capability, and fuel economy, with the diesel offering the best torque for towing and the 6.2L V8 providing the strongest peak output.
Performance and use-case considerations
5.3L V8 gasoline engine
Offers solid everyday power with good payload capability and broad availability. It’s the best-value choice for most buyers who don’t regularly tow heavy loads, while still delivering robust acceleration for daily driving.
6.2L V8 gasoline engine
Delivers the highest gasoline output in the lineup, with stronger acceleration and superior towing capacity. Ideal for buyers who frequently haul heavy trailers or carry heavy loads.
3.0L Duramax turbo-diesel inline-six
Focuses on torque and efficiency, especially on long highway trips and substantial towing. Though it carries a higher upfront price, it's favored by those who value sustained pulling power and better fuel economy on long drives.
Choosing the right powertrain
When selecting a Suburban powertrain, consider how you’ll use the vehicle: daily commuting, family hauling, and how often you tow. If you regularly tow or haul heavy payloads, the 6.2L V8 or the diesel are strong choices. For a balance of capability and lower upfront cost, the 5.3L V8 remains a solid default option.
Summary
The Suburban’s current lineup includes two gasoline V8 engines (5.3L and 6.2L) and a 3.0L Duramax turbo-diesel inline-six. There is no modern gasoline V6 option, and all engines pair with a 10-speed automatic transmission. Buyers should weigh power needs, towing plans, and efficiency when choosing among these options.