The automaker, in its 2016 Sustainability Report released in June, said while it met a goal to double the number of vehicles with 40 miles per gallon or more highway fuel economy by this year, it expects to fall well short of having a half-million electrified vehicles on the road in 2017. The company blames low gas prices, poor consumer acceptance and more competition for missing the mark.

“We are now focused on establishing a new set of product commitments that tie performance more closely to our internal capabilities rather than market forces beyond our control,” GM said in the report.

The automaker declined comment on those changes and when they would roll out.

In fall 2012, GM Chairman and CEO Mary Barra announced a target of 500,000 vehicles that would be powered in some way by electricity including plug-ins, pure electrics and hybrids. Barra then led GM’s global product development organization.

GM reported it had 243,133 electrified vehicles on U.S. roads last year, up more than 23 percent from 197,065 in 2015; 177,756 in 2014; and 150,623 in 2013.

The automaker late last year launched the 2017 Chevrolet Bolt EV, a pure-electric with an estimated 238 miles of range that starts at less than $30,000 after factoring in up to a $7,500 federal income tax credit.