Searching through the history of the iconic American brand, however, it's hard to find many iconic V6 models. Sure, there's the Grand National from Buick (another GM-owned company) but what about ...

But more cubic inches under the hood doesn't mean GM engines will be gas guzzlers, said Fritz Indra, GM's chief engine engineer. Most GM V-6 and V-8 pushrod engines will have cylinder deactivation ...