The 2021 GMC Sierra Heavy Duty pickup hog mollies are back this year—how could you miss them? Mechanically related to the Chevrolet Silverado HD twins, the GMC versions are comparatively a little more rock ‘n’ roll. New this year are versions of the pickup that take it further off-road (X31) and take it further into superlative naming schemes (Denali Black Diamond). It’s still offered in 2500 and 3500 versions, with single- or dual-rear-wheel configurations, with one of two V-8 engines. Regular-, double-, and crew-cab configurations are available, the last of which is more popular with retail shoppers.

It’s a 7.0 on our rating scale with two important asterisks—heavy-duty pickups aren’t rated for fuel economy or safety. If scored, it would almost certainly sink that number; the truck lacks standard active safety features found on many other new cars and its…

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