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I'd take a deep breath and attack the easy first - remove the controller then do an upper cleaning and add some Techron (great stuff) to the tank for an injector cleaning.
Used both and i believe CRC is a better upper cleaner for DI engines and I clean mine at every 5k oil change.
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2018 SS wheels, red Heritage grille, actual driving lights, ZL1 strut tower brace, GM Performance billet aluminum fuel door, front grille Bowtie delete, painted red rotors and calipers, 1/4 window American Flags, splash guards, AEM dry panel air filter.
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