General Motors’ Duramax engine family is one of the three leading names in diesel engines, right up there with Ford’s Power Stroke and Cummins’ diesel engines — like the legendary Cummins 6BT — featured in Ram trucks. It’s also the newest of the three, its 2001 debut making it a veritable child compared to the Power Stroke — which debuted in 1994 — and Cummins, whose engines first became popular in the 1930s. Debuting in the form of a 6.6-liter
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