2020 GMC Sierra 2500HD / 3500 HD Sierra 2500HD Double Cab Long Box 2-Wheel Drive SLT

This full-size pickup operates on a rear-wheel drive layout and provides seating for six occupants. The exterior dimensions span 250.08 inches in length, 81.85 inches in width, and 79.82 inches in height. A reinforced frame supports a curb weight of 6352 pounds while maintaining a ground clearance of 10.12 inches. The chassis utilizes a torsion bar front suspension paired with a three-stage leaf rear setup.

Under the hood, a 6.6-liter V8 engine delivers 401 hp at 5200 rpm and generates 464 lb-ft of torque at 4000 rpm. Power routes through a six-speed automatic transmission equipped with a 3.73 final drive axle ratio. The truck manages a maximum towing capacity of 18500 pounds and handles a payload capacity of 3798 pounds. Inside the cabin, a seven-inch touchscreen runs the GMC Infotainment System alongside a six-speaker audio array. Standard safety equipment includes a rear vision camera, StabiliTrak stability control, and dual-stage frontal airbags for both front occupants.

Ownership coverage includes a basic warranty spanning three years or 36000 miles, while the drivetrain protection extends to five years or 60000 miles. Corrosion protection lasts for six years or 100000 miles. The electrical system relies on a 720-amp battery paired with a 170-amp alternator to support auxiliary components. A 36-gallon fuel tank reduces stop frequency during long hauling routes.