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Probably a bad valve spring that collapsed. Had a bad one in my 2010 2SS LS3 that was covered under warranty.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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