GM sales grow 74% YOY in Sept, Tesla sales grow 63%, Honda declines
In its September estimates, TrueCar says that General Motors has grown its sales most in the past year, increasing 74.2%.. GM also had the largest number of sales, at 200,000 units. Tesla is in second place with sales growth of 63% compared to the same time last year. Honda is the fastest shrinking automaker in US sales, down -15.3%.