The current GMC Sierra 1500 is 5,864 mm long, 2,062 mm wide and 1,927 mm tall, on a 3,693 mm wheelbase.
Only one generation of this model is in our catalogue, so there is no size history to compare yet.
Exterior figures are manufacturer specifications for the Sierra 1500, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.