Silverado HDs look similar to the lighter-duty Silverado 1500/2500, but have higher payload and trailering capacities. This report covers mainstay 3/4-ton 2500 and 1-ton 3500 pickups, though chassis-cab and chassis cutaway models are also offered.

Both HD Silverado series are available with rear-wheel drive or 4WD that must be disengaged on dry pavement but includes low-range gearing. An electronic-shift transfer case (replacing a manual lever) is standard on 4WD LTs, optional on LSs. Both 2500 and 3500 come in a choice of regular cab, an extended cab with rear-hinged back half-doors, and a Crew Cab with four full-size front-hinged doors. All can be ordered with front bucket seats or a 40/20/40 split bench. The extended and Crew Cab include a three-person rear bench. HD 3500s come only with an eight-foot cargo box; 2500s offer a 6.5-foot box as well. All 3500s have dual rear wheels on each side.

All models have standard dual dashboard airbags and antilock 4-wheel disc brakes; some offer GM's OnStar assistance system. Base engine is a 6.0-liter V8. Optional are an 8.1-liter V8 and 6.6-liter Duramax turbodiesel V8. The base engine teams with 5-speed manual transmission or optional 4-speed automatic with Tow/Haul mode. The two larger engines have a 6-speed manual or optional Allison 5-speed automatic with Engine Grade Braking, an electronic feature that makes an automatic downshift when descending steep slopes. Payload and tow ratings are claimed to be best in class. Silverado HD is similar to GMC Sierra HD.