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Posted

Hey wondering if I could get any help with this. I’ve swapped the injectors high pressure fuel pump checked pig tails for voltage everything except the regulator found on the fuel rail. I’m assuming if all 4 codes are popping it it’s an electrical problem not anything to do with the components themselves. I have no guidance and u have tried everything I personally know. Any advice? Thank you ladies and gentlemen.

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  • 3 years later...
Posted

Had a P000C8 code that put my 2018 Sierra 1500 5.3 in reduced power mode. After investigating it we found that the driver side wiring harness had rubbed against the noise reduction fender wall causing a bare wire. This problem showed up after running vehicle through the car wash.

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