Duramax wiring harness problem. Cover the harness with wiring conduit or a suitable material so the wires will not chafe again. I soldered 2-way connectors into the harness for #2 and #7 and made several pigtails with injector connectors. I changed the ficm ,cleared all codes and they come right back. Now two years later motor starts knocking again and lost power. Jul 1, 2022 · If you notice any of these problems, it’s important to have the wiring harness inspected by a professional as soon as possible. So harness and new tcm plus programming and laborer. Apr 21, 2005 · The wiring harness may relax and lay on top of the C107 support brace. Engine Wiring Harness Chafing Repairs Several engine wiring harness chafing conditions may be found on some 2019-2021 Silverado and Sierra models as well as some 2021 Tahoe, Suburban,Yukon and Escalade models. Discover symptoms, causes, and essential tips for reliable repairs. 9 • Serpentine belt near the fan clutch wiring harness support bracket (Fig. uchlln 169gs zfhr piz3 oul f33 uz wnpn cz oqpa8l