GMC DURAMAX® DIESEL TRUCKS & SUVs

Sierra has built a reputation for incredible performance, especially when it comes to diesel heavy-duty trucks. GMC’s legendary available Duramax 6.6L Turbo-Diesel V8 engine and 10-speed automatic transmission continue to offer the ultimate in pulling power. The engine delivers an impressive 470 hp and 975 lb.-ft. of torque. And with close gear spacing, the 10-speed automatic transmission allows the engine to operate in an optimal range at all times with varying load and terrain conditions. 

The dual-path intake system draws dense, cool air through both the hood scoop and the larger grille to enhance engine performance. And to help maintain optimal operating temperatures, Sierra Heavy Duty models equipped with the available Duramax Turbo-Diesel engine feature an integrated engine after-run cooling function. This function can continue to idle the engine after extended and exhaustive periods of use, allowing for proper cooldown of vital underhood components.

Along with incredible power, capability and efficiency, the Duramax 3.0L Turbo-Diesel engine offers Active Thermal Management to help maintain an ideal engine temperature and an electrically controlled, variable-geometry turbocharger that helps enable responsive acceleration.

GMC didn’t stop at just technology aimed at fuel delivery. The Duramax 3.0L Turbo-Diesel also has a lightweight all-aluminum engine block, which results in a 25 percent savings in mass over a comparable cast iron engine block. With the Duramax 3.0L Turbo-Diesel, you’ll experience great power with a broad torque band, all without a compromise in efficiency.