<strong>Heavy-Duty Family Hauler</strong><br />Wait. Why does this Suburban have Silverado HD front fenders, hood, grille, and bumper? And what's up with the Suburban HD badging? Answer: This is a Suburban HD Z71 and it's powered by a concept 4.5L diesel engine that produces 310 hp and 520 lb-ft of torque. It sure beats a minivan.