The Suburban GMT400 hails from an era when the American full-size SUV unashamedly embraced its colossal proportions, separate ladder frame, and pickup-truck underpinnings. Offering three rows of seating, heavy towing capability, and a pillowy ride, it was engineered for large families and serious leisure hauling. In this segment, its traditional sparring partner remains the early Ford Expedition, although the Chevy feels even more utilitarian in character. Thorough and methodical Chevrolet Suburban maintenance is paramount to keep this heavyweight hauler operating safely.