In March, sales of GM rose 12%. Passenger car sales rose 22%, while compact-crossover sales increased at a high of 47% and mid size vehicles were up 38%.In mid-morning trading shares of the company were 22% at $26.18.General Motors (NYSE:GM) has potential upside of 30.7% based on a current price of $26.21 and an average consensus analyst price target of $34.27.