General Motors Company (NYSE:GM) will release earnings results for the third quarter, before the opening bell on Tuesday, Oct. 21.Analysts expect the Detroit, Michigan-based company to report quarterly earnings at $2.32 per share, down from$2.96 per share in the year-ago period. The consensus estimate for GM's quarterly revenue is $45.33 billion, compared to$48.76 billion a year earlier, according to data from Benzinga Pro.On Oct. 20, General Motors announced that its board of directors declared a quarter ...