FACTBOX: Key facts about U.S. October auto sales

(Reuters) - U.S. auto sales fell 2.7 percent in October from a year earlier, adjusted for an extra selling day this year, according to data released on Thursday by auto manufacturers.

The following are highlights from sales data released by the largest carmakers in the U.S. market.

Overall industry

* Total light vehicle sales -- 1.23 million units, down 2.7 percent.

* October seasonally adjusted annualized rate of light vehicle sales (SAAR) -- 16.05 million units, down from 16.31 million a year earlier.

General Motors Corp (GM.N)

* Car and light truck sales down adj. 0.6 percent (307,408 units)

* Year-to-date sales down 5.7 percent

* Inventories at month-end: 950,000 units, down 125,000 units from year earlier

* Cars/trucks: Cars down 4.5 percent/light trucks up 1.7 percent

* Market share: 24.8 percent

* Key vehicles: Chevrolet Impala down 5.4 percent, Chevrolet Malibu down 41.9 percent, Chevrolet Silverado down 10.6 percent, Chevrolet Tahoe up 26.8 percent, GMC Sierra down 7.4 percent.

* Incentives: average $3,118 per vehicle, up from $2,575 a year earlier.

Toyota Motor Corp (7203.T)(TM.N)

* Car and light truck sales up adj. 0.5 percent year over year (197,592 units)

* Year-to-date sales up 3.5 percent