General Motors has issued a service update for certain units of the refreshed GMC Sierra 1500 pickup equipped with the 3.0L I6 LZ0 turbodiesel Duramax engine and non-ETRS transmission due to a problem ...

On paper at least, GM's crate motor program appears to offer engines that deliver excellent results in terms of bang for the buck. But the speed equipment business in general seems to thrive on ...