GM Sales Nosedive Amid Industry Free Fall in October

General Motors Corp.’s October sales plunged 47% – adjusted for 27 selling days this year vs. 26 last year – as weak consumer confidence and the ongoing credit freeze combined to send the overall U.S. light-vehicle market to levels not witnessed in the post-World War II era.

GM delivered 168,800 vehicles in the month, compared with 307,592 year-ago, according to Ward’s data. So far this year, ...