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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    NK7 Factory-verified

    GMC · Regular Production Option

    Fuel tank, approximately 31 gallon

    Years 1983–87 Models 2 Factory citations 9
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    Also documented for Chevrolet

    Documented applications

    Jimmy (full-size) — Square body (1983–1991)
    • 1983–1986 Factory-verified

      about 31 gallons with gasoline engines and 32 gallons with the diesel; replaces the production tank; shared square-body platform code; cited from the Chevrolet Blazer kit

      GM Heritage factory kit — 1983 Chevrolet Blazer, p.11.
      GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.19.
      GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.12.
      GM Heritage factory kit — 1986 Chevrolet Blazer, p.13.
    Suburban — Square body (1983–1991)
    • 1983–1987 Factory-verified

      about 31 gallons with gasoline engines and 32 gallons with the diesel; replaces the production tank; shared square-body platform code; cited from the Chevrolet Suburban kit

      GM Heritage factory kit — 1983 Chevrolet Suburban, p.18.
      GM Heritage factory kit — 1984 Chevrolet Suburban, p.20.
      GM Heritage factory kit — 1985 Chevrolet Suburban, p.21.
      GM Heritage factory kit — 1986 Chevrolet Suburban, p.22.
      GM Heritage factory kit — 1987 Chevrolet Suburban, p.27.

    This page aggregates every documented appearance of NK7 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.