If GM has its way, America’s infatuation with the pickup truck won’t necessarily have to come with nearly as much eco-guilt. GM is currently investing big, in ways to significantly improve fuel efficiency on their newer lines of trucks.

The focus of the investment, which is expected to be in the hundreds of millions of dollars, will be on improving the mileage of the full size GMC Sierra and Chevy Silverado (pictured above).

GM is coming at the improvements from all angles and going beyond typical engine adjustments with things like an upgraded grille that would include electronically adjusted openings that would boost aerodynamic efficiency while engine cooling is not required.