GM’s global workshare strategy appears to be taking on more of a role than just exchanging cars for rebadging. Holden, GM’s Australian subsidiary, recently announced that their powertrain engineering team will be responsible for calibration of the ’13 Malibu for GM’s global markets.

The work is being conducted at Holden’s Lang Lang Proving Ground in Victoria, with test cars being evaluated on public roads. Chevrolet’s first global midsize sedan will be sold in almost 100 countries around the world.

Fuel efficiency is a high priority for the car and is to be achieved through a number of approaches.

A range of four-cylinder engines will be used, though the details for international powertrains have yet to be released. A 2.5-liter, four-cylinder engine and next-generation six-speed automatic will lead Malibu’s powertrain lineup in North America.

Additionally, the new Malibu’s exterior is anticipated to be SAE-certified as one of the most aerodynamically efficient cars in the segment, with a coefficient of drag (Cd) rating close to the Chevrolet Volt’s Cd of .280.

“The exterior design of the all-new Malibu carries DNA from its sister vehicles, the Camaro and Corvette, to bring a sporty sensibility to the family sedan segment,” said Bryan Nesbitt, executive director for GM exterior design.

A wider stance, broad shoulders and an integrated rear spoiler bring a new, lean look to Malibu with a more aggressive appearance. While the new Malibu has a 4.5-inch (114 mm) shorter wheelbase, the front and rear tracks that are more than 2 inches (51 mm) wider than the current model. Other exterior design cues include Chevrolet’s dual-port grille, projector HID headlamps and new Camaro-inspired LED dual-element tail lamps.

Holden’s work on the Malibu is expected to continue until the end of 2012. In North America, the new Malibu is expected to be available in mid-2012.