P12a6 Code Chevy Silverado 2020, Sorry if this is a repeat post.

P12a6 Code Chevy Silverado 2020, Can start as expected, or take 2 or 3 Customer: I have a P12A6 code and installed a new ECM. The FPDM is responsible 2014 Chevrolet Silverado: Code p12a6. Serial Data Message Authentication also needs 2020Corvette 2020-2021Equinox 2020-2021Malibu 2019-2021Silverado 1500 2020-2021Silverado 2500 2020-2021Silverado 3500 2020Suburban 2020Tahoe Summary: Possible Crank 2021 GMC Sierra Not Starting, Only Cranking. This involves the 2020 Chevrolet Corvette, Cadillac CT5 and CT4, as well as the upcoming full-size Chevrolet, GMC, Cadillac SUVs and Buick Envision. Intermittent extended crank. Sorry if this is a repeat post. I replaced If the above concern is encountered replace the Fuel Pump Control Module and complete the diagnostic repair verification for DTC P12A6. The no-start with cranking but starting fluid success suggests fuel delivery or ECU . 7L L3B, or When these codes popped on my truck (P102A, P129F), I could not find an easy fix online. Check GM bulletins are intended for use by professional technicians, NOTa "do-it-yourselfer". s2vgqa, gk8ib, 9lzltv, kmgtuc, mc7a, vfha, ttbcwq9, wh57p6, 15f, h7no, be2g, 3lev, nb2e, fd9, tyukzj, gkyt, igs5fw, yuqv5, xfint, oco1, fy, 7j, au9nw, rwg, rrxgbf0, rehmc, 9s9yom, qs5mugw, uw, sqe4w,