GMC Sierra Denali 6.2L EcoTec3 V8 Engine (2014–2018)

What This Engine Is

This is the original 6.2‑liter EcoTec3 V8 engine available in GMC Sierra Denali full‑size trucks from model years 2014 through 2018. It’s a factory‑engineered GM small‑block V8 that balances strong performance with everyday usability. This engine is popular for replacements, performance builds, and engine swap projects that want genuine GMC power.

Engine Overview

The 6.2L is a naturally aspirated V8 with advanced GM technologies that improve power and efficiency. It was offered as an available upgrade on Denali trim Sierra 1500 models during these years.

Key engine features include:

• 6.2 liter displacement (376 cubic inches)

• GM EcoTec3 Gen V small‑block V8

• Aluminum block and heads

• Direct fuel injection

• Variable valve timing

• Active Fuel Management (cylinder deactivation)

Performance and Power

This engine delivers robust power, ideal for towing, hauling, and confident acceleration on the highway. Typical output for the 6.2L in these Sierra Denali models is:

• Around 420 horsepower at 5,600 rpm

• Around 460 lb‑ft of torque at 4,100 rpm

These figures make it one of the strongest gasoline engines in light‑duty pickup trucks of its time.

Fuel and Efficiency

The engine uses direct injection and advanced variable valve timing for improved combustion efficiency and responsiveness. Active Fuel Management helps reduce fuel use by deactivating cylinders under light loads.

Fuel type is regular gasoline, and some configurations may accept E85 flex fuel.

Typical Applications

This 6.2L engine is ideal for:

• GMC Sierra 1500 Denali truck replacements or rebuilds

• Performance truck builds and restorations

• Engine swap projects into compatible GM platforms

• Towing and utility applications that benefit from high torque

Why Choose the 6.2L Sierra Denali Engine

The GMC Sierra Denali 6.2L EcoTec3 V8 combines modern engine technology with real‑world capability. Its high torque output makes it well suited for towing and heavy loads, while its direct injection and AFM systems improve efficiency whenever possible. It offers strong performance backed by proven GM engineering across multiple model years.

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