Q. GM’s recent sales surge–what’s their secret? Great new models? Superior quality? A: Heavy price-cutting to goose sales (at an inevitable cost in profits). … Maybe that’s why GM stock is plunging priced so realistically. … P.S.: GM has now begun selling Chinese-made GM cars outside of China. Right now these are small Chevies aimed at developing markets. How long before they are Buicks and Cadillacs marketed in this country? You think Americans won’t buy a Chinese-made Cadillac? Those must be the same Americans who would never buy a Japanese luxury car. … True, the Chinese Caddies won’t be as well made. They will almost certainly be better made. (In the latest Consumer Reports survey, Cadillac still had “below-average reliability“). …