top of page

Join the Story Cars Newsletter

2000 GMC Terradyne Concept Truck


The GMC Terradyne, a concept vehicle, represents the future of GMC trucks with its bold design and innovative features. The truck is named after "terra," Latin for "of the earth," and the Greek "dyne," meaning "strength and power."


Powering the Terradyne is the Duramax 6600™ engine, known for its excellent fuel economy and advanced technology. The engine features a direct-injection, common-rail fuel system that sprays fuel directly into the combustion chamber, promoting efficient combustion. The injection pressure is controlled by the Electronic Driver Unit (EDU), allowing for variable pressures of up to 23,000 psi, significantly higher than normal fuel injection systems.

The four-valve-per-cylinder configuration of the Duramax 6600™ engine is a state-of-the-art design, optimizing airflow and improving breathing at higher RPMs. This design, coupled with a slight twist to the shape of the valves, enhances combustion processes, controls emissions, and maximizes fuel efficiency, resulting in more horsepower than competing designs.



Efficient cooling is crucial for engine performance, and the Terradyne incorporates various features for this purpose. A charge air cooler functions as an air/air radiator, cooling compressed air from the turbocharger before it enters the engine, improving fuel combustion and power. Additional cooling features include an integral oil cooler, a piston spray cooling system, and a transmission oil cooler, all contributing to a cooler-running engine and extended component life.