General Motors will revamp its Duramax V8 engine to meet new diesel emission rules for the 2007 model year, reports Automotive News. GM will give the powerplant a new variable geometry turbocharger, enhanced exhaust gas recirculation, a closed crankcase ventilation system, and an oxidizing catalytic converter to bring it up to standards. The report indicates the changes could add at least $3,000 to the cost of building the truck.
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