GM disputes Canadian auto union's Super Bowl ad - Winnipeg Free Press
- GM disputes Canadian auto union's Super Bowl ad Winnipeg Free Press
- General Motors threatens to sue union over Super Bowl ad Detroit Free Press
- General Motors disputes UNIFOR's Super Bowl ad CTV News
- General Motors seeks to block UNIFOR ad it calls misleading, inaccurate Toronto Sun
- GM trying to 'intimidate' union from airing Super Bowl ad, Unifor says CBC News
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