The idea behind GM's active and dynamic fuel management systems is brilliant, but they may be asking too much of the poor ...

A federal judge has handed General Motors a key procedural victory in the long-running GM lifter lawsuit, denying a late-stage effort by plaintiffs to split the case into two separate legal battles.

In their later years, Vortec engines have fallen victim to some downsides, like Active Fuel Management, an aggressive thirst for oil, and engine knocking. But back when they were brand-new, these ...