GM saw sales plunge 7.1% and Fiat saw sales drop 10% for the first quarter of 2020, both larger than expected declines, according to Bloomberg. It's also worth noting that the industry didn't quite grind to a halt until March, and so Q2 numbers could wind up being far worse.
Toyota's sales fell 37% in March, with even its best-selling RAV4 dropping 25%. Nissan had the weakest quarterly results, posting a 30% drop in sales for the first three months of the year. More than 25% of Nissan's dealers are being negatively affected by state ordinances limiting sales.