GM says stop-start will come standard on Impala's base engine

The 2015 Impala will be on lots this summer, with the 2.5-liter starting at $27,735, including shipping.

UPDATED: 5/23/14 10:55 am ET - clarifies availability

DETROIT -- General Motors is making stop-start technology standard on the 2015 Chevrolet Impala’s base 2.5-liter engine, boosting the sedan’s fuel economy by 5 percent.

The implementation of stop-start is part of an overall push by GM to increase the use of the system in its vehicles, GM spokesman Chad Lyons said Thursday.

“It is definitely a technology that will become more prevalent in GM vehicles,” Lyons said.

Stop-start works by turning off the engine to decrease fuel consumption in certain conditions, such as stop-and-go traffic.

The Impala revamped its look with the 2014 model to become a flagship vehicle for Chevrolet, rather than its previous reputation as a rental lot staple. It is the second GM vehicle to include the stop-start as standard after the 2014 Chevrolet Malibu, which improved its fuel economy by about 14 percent.

Because the technology was developed for the 2014 Malibu, it will only come standard in the 2.5-liter 2015 Impala rather than both the 2.5-liter and 3.6-liter engines.

“We had already developed the system on the four-cylinder engine for the Malibu, so it made sense to transfer that to the four-cylinder Impala and not have to redevelop it for the six-cylinder,” Lyons said. “That’s not to say it cannot be developed for the six-cylinder.”

According to a Navigant Research report, the number of vehicles with stop-start technology sold internationally will increase from 8.8 million in 2013 to 55.4 million in 2022.

The 2015 Impala will be on lots this summer, with the 2.5-liter starting at $27,735 and the 3.6-liter’s base sticker at $30,960, both including shipping.

You can reach Katie Burke at -- Follow Katie on Twitter: @KatieGBurke

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