The 2006 GMC TopKick C5500 is part of the medium-duty truck lineup ideal for commercial use. This vehicle comes with a 6.6L V8 Duramax Diesel engine that outputs 300 horsepower and 520 lb-ft of torque. It is coupled with a robust Allison 1000 Series transmission to provide heavy-duty handling capabilities. Its Rear-Wheel drivetrain allows for adequate weight distribution and rugged use. The interior offers a utilitarian design with focus on durability and functionality rather than luxury. Despite being a commercial vehicle, the TopKick C5500 includes safety features such as ABS brakes and a driver airbag as standard. Interestingly, this particular GMC model is famously known as the alter ego for the Autobot 'Ironhide' from the 2007 film 'Transformers'.