The HD Sierra is designed for heavy towing and hauling, and rides stiffer than the Silverado 1500.
The standard engine is a 6.0-liter V8.
Our tested 397-hp, 6.6-liter turbodiesel produced a whopping 765 foot-pounds of torque and could haul close to a 2,500-pound payload.
The diesel is punchy but noisy, and the Allison-made six-speed automatic is smooth.
Alerts
There are 3 recalls on this vehicle.
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