​One of America's oldest heavy duty vehicle makers, Mack Trucks specializes in truck building and design. The brand nearly disappeared due to the economic collapse of 2009 but was saved after being purchased by Volvo Group.

Mack Trucks was founded originally as Mack Brothers by John, Augustus (Gus) and William Mack after they had purchased the carriage and wagon company John had been working for. The Mack Brothers had been inspired by other engineering pioneers of the era in the early 1900's such as the Wright Brothers and Henry Ford and decided to focus similar energy on building trucks. Mack Trucks gained most of its reputation for building strong well built trucks during World War I and II.

Mack Trucks had been tested by the U.S. Army and approved for service but were purchased by the British in larger numbers. British Soldiers remarked that Mack Trucks were dependable and resilient and early Mack Trucks often featured a "snub nose" design. The British Soldiers nicknamed them "Bulldog Macks" because they reminded them of the English Bulldog. The Nickname eventually stuck and has since been the logo of the company. All Mack Trucks adorn an English Bulldog hood ornament as a reminder of this history.

The most iconic Mack Truck of the modern era is the Mack Granite. It is a vocational work truck which can be configured in any way the buyer wishes. The Granite is perhaps most known for being used as a Dump Truck and Concrete Mixer for construction companies accounting for the majority of U.S. Sales.
Mack is also notable for its sales and manufacture for the Australian, New Zealand and South Africa markets. Trucks for those markets have slightly different requirements and are also Right Hand Drive. The Mack Titan is the most common "down under" as it has a stronger engine and drivetrain than most other highway trucks. This is why it was marketed toward companies which operate road trains.

As a Subsidiary of Volvo Group, Volvo trucks and buses can also be sold and serviced at Mack dealers in North America. Volvo sells more trucks for on highway purposes but Mack trucks often are better suited for vocational and construction work. Mack Granite trucks can be equipped with a "Crawler Gear" which locks the rear differential giving the driver more control when going downhill on unpaved surfaces.