Overview
The 2021 GMC Sierra 2500HD and 3500HD embody the perfect blend of brawn and brains, effortlessly balancing heavy-duty capabilities with refined features. While not the most luxurious in its class, the Sierra HD boasts an impressive Duramax diesel engine, producing 910 lb-ft of torque and towing up to 35,500 pounds.
Price
Priced from $44,595 to $66,495, the Sierra HD offers exceptional value for its capabilities. The crew cab with standard bed and SLT trim level is recommended, featuring the versatile MultiPro tailgate, heated steering wheel, and power-adjustable front seats.
Engine and Transmission
The Sierra HD’s standard 6.6-liter V-8 gas engine delivers 401 horsepower and 464 lb-ft of torque, paired with a six-speed automatic. The optional Duramax diesel 6.6-liter V-8 cranks out 445 horsepower and 910 lb-ft, paired with an Allison 10-speed automatic. The diesel variant shines with refined performance and impressive acceleration.
Dimensions and Interior
The Sierra HD’s spacious crew cab offers extensive passenger room and practical storage solutions. The interior features user-friendly switchgear, a split-folding front bench, and optional amenities like heated-and-cooled front seats and wireless charging. While materials quality is mediocre, the cabin prioritizes versatility.
Performance and Fuel Economy
The Sierra HD’s Duramax diesel engine and Allison transmission combination impresses with quick acceleration and responsive performance. The independent front suspension provides agile handling, while the available four-wheel drive and dual-rear-wheel axle enhance capability. The EPA doesn’t test heavy-duty pickups, but real-world testing reveals 17 mpg highway for the diesel Sierra 2500HD Denali. Compare this to 19 mpg for similar diesel-powered competitors.
The 2021 GMC Sierra 2500HD and 3500HD excel as heavy-duty workhorses, blending impressive capabilities with refined features. While not the most luxurious, the Sierra HD’s Duramax diesel engine, innovative MultiPro tailgate, and practical interior make it an excellent choice for those prioritizing functionality and versatility.