In the same way that Ford's F-Series of trucks includes both the regular full-size F-150 pickup truck range and the bigger Super Duty variants , GM's Chevrolet and GMC brand's offer both standard and larger heavy duty versions of their Silverado and Sierra pickup trucks respectively.
Following on from last year's introduction of the new generation 2014 Chevrolet Silverado and GMC Sierra trucks, today, GM revealed the 2015 Heavy Duty (HD) bodies of the two models, appropriately, at the State Fair of Texas.
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