In 1966 the company was founded by Marcel Dutil who had to respond to the growing demand for semi-trailers, Canam Steel Works based in Saint-Gédéon, Quebec (a province in canada).

The brand name CPS Dump Trailer began in the 80s with the goal of helping the construction and agriculture industry with its need for specific semi-trailers.

Manac made the acquisition of the brand Peerless with the goal of building a bigger presence in the oil, gas, forestry, and construction industries in western Canada.

Peerless sells more than 100 types of trailers in the following sectors:[9] In 2009, Manac made the acquisition of the intellectual properties of Trailmobile Canada and part of their equipment.

Trailmobile Trailer LLC was originally a pioneer in the production of semi-trailer for over 100 years within the United States but went bankrupt in 2001; however their Canadian operations remained active until 2009.