The HD Silverado and its twin, the GMC Sierra HD, are designed for heavy towing and hauling. The 6.0-liter V8 and 6.6-liter turbodiesel are both mated to a six-speed automatic. The latter works well and employs a heavy-duty Allison-made transmission. A natural-gas version of the 6.0-liter V8 is also available. The LTZ trim has a luxurious cabin. If you don't plan to go off-road, the Z71 suspension is superfluous--it severely degrades ride comfort. These HD pickups are the better choice for commercial snow-plowing duties. Available safety features include forward-collision warning, lane-departure warning, and front and rear park assist. Android Auto and Apple CarPlay are compatible with the infotainment system.

These trucks are much stiffer and ride less comfortably than the standard Silverado 1500 (1/2 ton). They are designed for hard work and a 3/4-ton capacity. The ride is bouncy but the available engines include a relatively refined, Isuzu-developed 6.6-liter turbodiesel V8 and a huge 8.1-liter, 340-hp V8. The 2007 redesign brought a new 6.0-liter V8 in addition to the older 6.6-liter V8 turbodiesel. The latter engine is very powerful but returned just 13 mpg overall. The six-speed Allison transmission is very smooth.

These trucks are much stiffer and ride less comfortably than the standard Silverado 1500 (1/2 ton). They are designed for hard work and a 3/4-ton capacity. The ride is bouncy but the available engines include a relatively refined, Isuzu-developed 6.6-liter turbodiesel V8 and a huge 8.1-liter, 340-hp V8. The 2007 redesign brought a new 6.0-liter V8 in addition to the older 6.6-liter V8 turbodiesel. The latter engine is very powerful but returned just 13 mpg overall. The six-speed Allison transmission is very smooth.

These trucks are much stiffer and ride less comfortably than the standard Silverado 1500 (1/2 ton). They are designed for hard work and a 3/4-ton capacity. The ride is bouncy but the available engines include a relatively refined, Isuzu-developed 6.6-liter turbodiesel V8 and a huge 8.1-liter, 340-hp V8. The 2007 redesign brought a new 6.0-liter V8 in addition to the older 6.6-liter V8 turbodiesel. The latter engine is very powerful but returned just 13 mpg overall. The six-speed Allison transmission is very smooth.