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Whether you’re on the road or off, you’ll be driving with the capability of Sierra AT4’s proven powertrain portfolio:

  • New 5.3L V8 with Dynamic Fuel Management paired with 8-speed automatic transmission serves up 355 horsepower and 383 lb-ft of torque
  • New available 6.2L V8 with Dynamic Fuel Management paired with all-new 10-speed automatic transmission provides and impressive 420 horsepower and 460 lb-ft of torque
  • New available 3.0L Duramax Turbo Diesel inline 6-cylinder paired with all-new 10-speed automatic transmission (late availability)
  • All-new industry-first Dynamic Fuel Management system enables the engine to operate in 17 different patterns between two and eight cylinders, depending on demand, to optimize power delivery and efficiency
  • The all-new 10-speed transmission has more gears that mean more ratios, which gives Sierra AT4 refined performance and outstanding shift quality