Peterbilt will offer three new engines fueled by liquefied natural gas on its Models 387, 386 and 367 in 2009. The factory-installed LNG system is part of a joint agreement with Westport Innovations to provide natural gas versions of select …

The Detroit automaker pulls the plug on the power plant that appeared to be on track to replace the aging Northstar engine in future Cadillacs and other luxury models.