[2] On November 26, 2018, GM announced the closure of its Oshawa plant, ending a century of automobile and related manufacturing operations in the city.

[5][6] General Motors of Canada opened its new head office building on the shore of Lake Ontario in 1989.

The building is a fixture on Highway 401 and usually displays an enormous picture of a new vehicle on its huge glass atrium.

It is primarily responsible for managing the design and validation of vehicles that are manufactured in Canada, though it supports many joint development efforts with GM operations in other countries.

The centre's main tenants are the Oshawa Generals junior hockey team, who were named for the company in 1937.

The "Canadian Technical Centre Oshawa Campus" is GM's second largest automotive software engineering and development cluster in North America and third in the world.

[11] Located in Oshawa, Ontario, next to the plant which builds midsize cars,[15] the CTC is where the company conducts much of its engineering and software work.

After three years of growth and the construction of the CREC building, the organization grew to over 500, and work was focused on designing future products such as the next-generation Chevrolet Equinox, built in Ingersoll, Ontario, as well as supporting the highly rated car and truck plants alongside CREC in Oshawa.

In 2008, CREC's focus began changing, and its size reducing, due to contractions in GM's workforce in general, and the rise in the Canadian dollar.

the engineering staff has been cut dramatically, several times,[16] in response to the shift in focus from mainstream vehicle development to advanced technology work (ATW).

The total reduction reached more than 60% in June 2009, leaving a workforce of about 150 concentrated in various areas of ATW and heavily linked with Canadian government-supported programs such as the Automotive Innovation Network (AIN).

The "Automotive Software Development Centre" in Markham, Ontario, is GM Canada's expansion of its Oshawa campus.

[17] Announced in 2016 and opened in 2017,[15] the facility is meant to support work done on GM's advanced driver-assistance features, its fully autonomous vehicle program, and infotainment system design.