Costco-GM promotion proves value of 90-day sales drives

A 90-day sales drive beats a 60-day one. By a lot.

That's the lesson from a 90-day sales promotion between General Motors and Costco Auto Program that ended Jan. 2. It generated more than 15,200 new-vehicle sales, three times more than a similar 60-day program a year earlier, the warehouse retailer says.



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