GMC Sierra 2500HD (2015) is 2088 mm (82.20 inch) longer, 350 mm (13.78 inch) wider, 393 mm (15.47 inch) higher and has 1299 liters (45.87 ft3) bigger cargo space than Subaru Trezia (2014).
Subaru Trezia (2014) is 544 kg (1,199 lbs) lighter than GMC Sierra 2500HD (2015).