GM is set to launch a comprehensive review of its global media spending.

The review includes media buying companies in various countries around the world such as US, Europe and Latin America. India and China are not included in this review. The company claims to have more than 20 media buying companies.

The review consists of only paid media and also does not include creative agencies.

March 2011 annual report of the company reported worldwide advertising costs of US$ 4.26bn in 2010. Ad Age Dataceter estimated an expenditure of $3.37bn on advertising in 2009.

In 2010, GM spent 67% of media budget on advertising and promotion in North America alone.

Since its recovery from bankruptcy in 2009, GM has had a number of dramatic shifts in its media global spending.