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Good info, Thanks for sharing!
What GM won't tell you is the reason for the bypass valve. ALL GDI engines experience many times the abrasive particulate matter shed from intake valves and contaminating the engine oil. The filters may clog to the point of restricting oil flow and turned bearings are the result. And this is not just the GM GDI engines, it is ALL GDI engines as this is an inherent problem along with the fuel dilution issues.
Cheers!
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