Street Smarts: Pre-SCR and proven tech power Detroit’s Gen 6 diesel engines

Jack Roberts

27 March 2026

Daimler Truck North America has rolled out the sixth generation of its Detroit DD-Series diesel engine family. On Feb. 17, the OEM debuted the new engine lineup at its historic Detroit manufacturing campus in Redford, Mich., just outside of the Motor City.

The new Gen 6 Heavy-Duty Engine Platform (HDEP)…

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