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I can pretty much guarantee if an injector was failing a CEL light would have come on with a code or codes. I know because I had 2 injectors replaced under warranty in my 2016 SS and several codes popped up. The tech found the faulty ones on the first visit to the dealership.
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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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