Sure, GMC trucks and SUVs look great, but they aren’t made to just sit still. They're designed, engineered, and built to deliver impressive performance, allowing you to tackle any task at hand. That’s why GMC’s EcoTec3® and DURAMAX® engines deliver performance without concession, providing outstanding power and torque when the job calls for maximum effort.
To give you uncompromised vehicle performance with the power and torque you need for confident daily driving, passing, and trailering, look no further than the EcoTec3 engine family available on GMC Sierra 1500 and Yukon models.
The advanced vehicle performance technologies behind our most innovative engines.
All EcoTec3 engines incorporate direct fuel injection, allowing them to produce the power you expect without consuming any more fuel than needed. This advanced technology allows fuel to be precisely metered and injected into the engine’s combustion chambers, helping improve efficiency.
EcoTec3 engines optimize vehicle performance with Variable Valve Timing for easy responsiveness in low-speed city driving and bold power for open-road passing or trailering. It monitors and changes valve open-and-close points for near-peak levels of torque across a full range of engines speeds.
For maximum fuel economy without a compromise in vehicle performance, GMC offers Active Fuel Management.™ This advanced truck engine technology, which is incorporated on all EcoTec3 engines, seamlessly activates or deactivates four of the engine’s cylinders in response to your vehicle’s performance and power needs, thereby consuming less fuel.
For off-the-chart horsepower and torque with off-the-map range, Sierra 2500HD and 3500HD Heavy Duty trucks are available equipped with heavy-duty performance DURAMAX® Diesel engines.
With advanced direct-injection technology that helps start the Sierra HD in as little as 3.0 seconds (even at -40°F) and a sophisticated Allison® transmission with overdrive, this available powertrain delivers maximum highway performance, with a range of up to 680 miles on a single fill-up, thanks to its 36-gallon fuel tank.
To reduce carbon dioxide emissions and stretch your fuel budget further—without sacrificing vehicle performance—the DURAMAX 6.6L engine is engineered to operate on B20 biodiesel fuel, a mixture of 80% petroleum diesel and 20% biodiesel produced from domestic, renewable resources.
GMC direct fuel-injection technology operates at nearly 30,000 psi to turn heavy diesel fuel into a fine mist that burns clean and fast. The results are faster starts in cold weather and quieter operation, as well as lower emissions, greater power for maximum efficiency, and overall outstanding vehicle performance.