2020 GMC Sierra Heavy Duty, the most capable GMC heavy-duty truckEdward Green ▼ | January 24, 2019
Bigger, stronger and smarter, the all-new 2020 GMC Sierra Heavy Duty combines greater trailering capability with technologies designed to provide customers with a world-class towing experience.
Cars Bigger, stronger and smarter
First introduced with the 2019 Sierra light duty, the ProGrade Trailering System leverages technology advancements to offer additional features and functionality for the 2020 Sierra Heavy Duty. Owners of the 2020 Sierra HD will have access to available smart trailer technology designed to allow access to select features of the iN∙Command control system from ASA Electronics through the myGMC mobile app, either on compatible Android and iOS smartphones or on the vehicle’s infotainment system via Apple CarPlay or Android Auto.
The ProGrade Trailering System also includes an in-vehicle Trailering App7 with Trailer Light Test, Trailer Electrical Diagnostics, Trailer Tire Pressure and Temperature Monitoring, Pre- Maintenance Reminders and Departure Checklist. Many of the Trailering app’s functions, including the lighting test and pre-departure checklist, are also available with the myGMC mobile app, a feature that offers great convenience when outside the truck or trailer.
Inside, the Sierra HD’s new interior has best-in-class front head- and legroom (maximum), with Crew Cab models. Denali-exclusive materials including premium leather-appointed seating, authentic open-pore wood trim and dark-finish aluminum decor raise the interior’s refinement. For the 2020 Sierra HD, the Duramax offers an SAE-certified 445 horsepower and 910 lb-ft of torque. The new Sierra HD marks the introduction of an all-new 10-speed Allison automatic transmission. ■