WOODCLIFF LAKE, N.J. -

Dealers with Big 3 brands collectively sold nearly 73,000 certified pre-owned vehicles last month and picked up an extra 1.5 percent of market share, according to Autodata Corp.

Domestics commanded 37.4 percent of the CPO market in January, the firm said, and their 72,841 certified sales beat year-ago figures by 22.1 percent.

Brands within the Ford family sold 22,714 CPO vehicles for the month, beating out January 2014 by 20.3 percent.

Over at General Motors, there were 35,362 certified sales of Buick, Chevrolet, GMC, Pontiac and Saturn vehicles. This was a 24.0-percent year-over-year improvement.

Cadillac had 1,873 certified sales for a 21.9-percent gain.

Moving to Fiat Chrysler Automobiles, the domestic brands there (Chrysler, Dodge and Jeep) sold 12,892 certified vehicles, which was a 20.2-percent uptick.

The Fiat brand, which is not included in that total or the overall Big 3 sum, moved 50 certified units last month, beating the January 2014 total of 34.