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Thread: tuning problem

  1. #1

    tuning problem

    Put a cold air kit with long tube headers into 2 1/2" true duals on my 2001 Sierra c3 6.0l and now getting a lean code what do I need to do to fix this problem? I have been told I need larger injectors and have my ECU remapped, is this possible for doing such a small upgrade?

  2. Racing Junk

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