Three more recalls have been announced by General Motors, raising its total to 48 so far this year.
The latest recalls cover almost 475,000 vehicles - mostly pickup trucks and SUVs from the 2014 and '15 model years. It includes 467,000 four-wheel-drive Chevrolet Silverado and GMC Sierra pickups, as well as GMC Yukon and Chevrolet Tahoe and Suburban SUVs.
GM says a software glitch can cause the transmissions to shift into neutral on their own.
More than 50.000 of the affected vehicles were sold in Canada.
So far this year, more than 20-million GM vehicles have been recalled worldwide for various problems.