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k3500 fuel system

  1. Introduction
    First time on this forum, helping out a friend with her "runs good" truck. She has a K3500 4x4 SRW flatbed with 454 engine. When the fuel tank gets below 1/4 full, the truck starts sputtering. Full tank, no issue until 1/4 full. She will replace the fuel filter first, and do a Dry Heat...