After selling off its European operations early last week, General Motors says it's interested in cutting more underperforming segments of its global business in a ruthless drive to boost profits and stock price.

CEO Mary Barra made it quite clear in the aftermath of the Opel deal that GM isn't done paring down its portfolio, with other moves already being considered.

"There's a little bit more work that we're doing in the international markets," Barra elaborated on a conference call from Paris, after announcing Opel's sale to PSA Group of France in a deal that shrinks GM's global volume by 12 percent. "Our overall philosophy is that every country, every market segment has to earn its cost of capital."

With GM targeting North American cars and under-performing international markets, Automotive News cites internal sources who claim employees at GM's other lower-margin units are starting to worry about what's next.

The bottom has fallen out from under North American car sales as consumers are scratching crossover sized itches, leaving GM with a four-month backlog of cars--double the industry average-- in comparison with two-and-a-half months of light trucks and 60 days' worth of full-size SUVs.

Small-cars and full-size sedans could be on the chopping block first. Chevy is the only brand selling two subcompact cars in the United States, the smaller, built-in-Korea Spark has seen its sales spike, while he slightly larger and made-in-Michigan Sonic has seen its sales crater nearly 50 percent year-over-year.

Both the Chevrolet Impala and Buick LaCrosse are also in dire straits, the Imapla has seen a 31 percent downturn in sales, while the LaCrosse has lost 60 percent of its sales volume; ridiculously, GM is sitting on a 340-day supply of LaCrosses as of March 1. It's unlikely that GM will shed another one of its brands.

Both Barra and GM President Dan Ammann refused to elaborate on exact plans or time frames; but did say diverting resources from low profit potential projects would allow GM to pour more money into Cadillac, China, SUVs and autonomous technology. GM is also focused on accelerating share buybacks in an effort to boost the company stock price and eliminate any outstanding potential for a hostile takeover.

"That's an immediate opportunity for us to reward shareholders without changing the risk profile of the company or our ability to manage through a downturn," CFO Chuck Stevens said.