The Sierra HD is a heavy-duty pickup truck manufactured by GMC. It is designed for towing and hauling, making it suitable for both work and recreational purposes. The Sierra HD features a robust engine lineup, advanced towing technologies, and a spacious interior, providing comfort and utility for drivers and passengers alike. Available in various configurations, the Sierra HD offers different bed lengths and cab styles to meet diverse needs. It also includes modern safety features and infotainment options, enhancing the driving experience. Overall, the Sierra HD is built to handle tough tasks while delivering a comfortable ride.