Originally Posted by fielderLS3
If GM feels it needs both a V8 and DOHC to be competitive in all its various segments, why not build a DOHC V8 like Toyota, Nissan, Ford, Hyundai, Mercedes, and Audi all do. Wouldn't one engine be more cost effective than 2? Don't get me wrong, I love GM's pushrod V8s (as they do have certain advantages over DOHC), but I am still just as happy overall with my DOHC one, too.
Well, GM did make DOHC V8s for many years (i.e., the Northstar line in Cadillacs, as well as a few Oldsmobiles & Buicks). For whatever reasons, the Northstar program was ditched.
Of course, one of the best DOHC V8s that GM ever sold was the one in the 1990ish Corvette ZR1. That engine was assembled by Mercury Marine rather than GM, though.
Bottom line... at this point in time in the GM world, it's a DOHC V6 or a pushrod V8. Take your pick.
With the push toward fuel economy, it wouldn't surprise me if GM never sold another DOHC V8. But who knows...