The 2025 GMC Sierra 2500 HD is a heavy-duty pickup truck that delivers outstanding performance and capability. With two powerful engine options, including a 6.6-liter V8 turbodiesel that produces 470 horsepower and 975 pound-feet of torque, the Sierra 2500 HD is ready to tackle even the toughest jobs in Monroe. The advanced 10-speed Allison automatic transmission ensures smooth, efficient power delivery.