The GMC Topkick C4500 is the first model in the GMC Topkick series by Monroe Truck Equipment. The other models include C5500, C6500, C7500 and C8500. The GMC Topkick C4500 is used as either a moving equipment truck or a dump truck and even as a school bus or a shuttle bus. It can also be used as a tow truck for medium sized vehicles. GM produces about 750 vehicles annually of the model. The Topkick can be used as a pick up truck only in the C4500 and the C5500 models. The C6500 and the C7500 are more heavy duty vehicles and they can’t be converted to be used as pick up trucks. The company has an option of a four wheel drive.

The engine is a powerful 6.6 liter turbo diesel engine having a power of 325 hp and 8.2 liter capacity. The automatic, five speed transmission is excellent and it can be shifted easily by the driver. The C4500 can reach the speed of 60 mph in just 14.4 seconds and the top speed of a fully loaded truck is recorded at 75 mph. The GMC Topkick C4500 weighs about 11,300 pounds and is faster than other competitors such as the Ford Escape. The truck also has a turbo charger with dual exhaust stacks. The pipes carrying fuel and air are entirely made of chrome.    

Coming to the interiors, the truck has heavy carpeting on the floor, the deck is made of high quality, polished wood and leather seats are also provided. The truck offers a good, clear view from the front windshield. The truck has a good suspension system consisting of two solid axles as well as air bladders on the rear side that helps the truck to carry heavy loads. The turning circle is quite good as a result of which the truck is able to take sharp turns. The C4500 has an advanced braking system in the form of hydraulic brakes. However the brakes take a while to cool off once they are applied. The cost of the C4500 starts from around $52,171 but after adding the extra accessories the costs may climb up to $90,000. the basic version can be procured for around $70,000.