The drivetrain includes a 10-speed Allison automatic transmission and provides up to 36,000 pounds of towing capacity when properly equipped. The Duramax is built on a strong foundation with its ...

However, the Duramax provides superior performance with a greater towing capacity and an Allison 10-speed automatic ...

For starters, new Silverado HD models sit on new frames and come with an optional all-new 6.6-liter Duramax V8 and Allison 1000 six-speed transmission. The truck’s base tow rating is now 16,000 ...

If you want the 397 horsepower, 765 lb-ft of torque Duramax diesel engine and unstoppable Allison transmission option, GM will politely as you for an additional $8,395. The good news is that ...