The Big 3 increased their share of the certified pre-owned market by nearly 4 percentage points in October, as their CPO sales climbed more than 35 percent year-over-year and edged the year-to-date sum closer to 600,000 units.

That’s according to Autodata Corp., which shared a brand-by-brand breakdown of certified sales data as well as industry-wide results on Monday afternoon.

Overall, domestic brands sold 62,578 CPO vehicles last month, a 35.5-percent uptick from October 2012, Autodata indicated.

Through 10 months of 2013, they have moved 595,969 certified units, which beats the year-ago period by 23.5 percent.

The Big 3 commanded 35.2 percent of the CPO market in October, up from 31.3 percent in October 2012.  The year-to-date market share for domestics is at 33.8 percent, compared to 31.5 percent through 10 months of 2012.

At Ford, its brands combined to sell 19,615 CPO units last month (up 36 percent year-over-year) and they have moved 190,012 units year-to-date (up 33.2 percent).

Certified sales for the Buick, Chevrolet, GMC, Pontiac and Saturn brands came in at 30,592 for October (up 40.5 percent), with 288,769 sales year-to-date (up 24.6 percent).

Cadillac moved 1,519 certified vehicles last month (up 18.9 percent), and its dealers have posted 15,275 CPO sales so far this year (up 11.2 percent).

Chrysler Group’s brands (excluding Fiat) sold 10,852 certified vehicles in October (up 24.3 percent), with year-to-date sales hitting 101,902 (up. 8.2 percent).

Joe Overby can be reached at joverby@autoremarketing.com. Continue the conversation with Auto Remarketing on both LinkedIn and Twitter.