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Ok finally got my ZL1 back from the oil pump failure issue causing the low oil pressure warning. Mine turned out to be a crack in the oil pump itself; not on the outside but on a metal part on the inside of the oil pump. It will be sent to GM for analysis but it appears to be metal fatigue possibly which may explain why only a few pumps failed. Also clarified that the oil pump is covered under the 5 Year Powertrain & Engine warranty which is good. Hoping this new oil pump is good for life of the car which is what is normal.
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