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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    LB4 Factory-verified

    GMC · Regular Production Option

    Engine, 4.3L V6, electronic fuel injection

    Years 1985–96 Models 6 Factory citations 34
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    Also described as Engine, 4.3L V6, 262 cu in, electronic fuel injection

    Also documented for ChevroletOldsmobilePontiac

    Documented applications

    Caballero — G-body (1983–1987)
    • 1985–1987 Factory-verified

      Base engine; 1987 from the LB4 engine page, which gives it as standard on the El Camino/Caballero; shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits

      GM Heritage factory kit — 1985 Chevrolet El Camino, p.10.
      GM Heritage factory kit — 1986 Chevrolet El Camino, p.5.
      GM Heritage factory kit — 1987 Chevrolet El Camino, p.23.
    Jimmy — first generation (1983–1994)
    • 1988–1989, 1991–1992, 1994 Single-source

      1988–1989 from the joint S-10/15 Blazer/Jimmy pages; the 1991, 1992 and 1994 books are Chevrolet-only S-10 Blazer books, so the row is single-source; the 1994 technical guide names its fuel system TBI; shared S/T platform code; cited from the S-10 Blazer kit

      GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.8.
      GM Heritage factory kit — 1989 Chevrolet Blazer, p.16.
      GM Heritage factory kit — 1991 Chevrolet S 10 Blazer, p.17.
      GM Heritage factory kit — 1992 Chevrolet S 10 Blazer, p.18.
      GM Heritage factory kit — 1994 Chevrolet S 10 Blazer, p.21.
    Safari — First generation (1985–1994)
    • 1986–1990, 1992–1994 Single-source

      the 4.3 liter (262 cu in) V6 with electronic fuel injection; 1986–1990 from the joint power team and option pages (1989 from the Astro/Safari passenger van power team page's LB4 ordering code); 1992–1994 rest on Chevrolet-only Astro option pages, so the row is single-source; shared M-body code; cited from the Astro kits.

      GM Heritage factory kit — 1986 Chevrolet Astro Van, p.10.
      GM Heritage factory kit — 1987 Chevrolet Astro Van, p.12.
      GM Heritage factory kit — 1988 Chevrolet Astro Van, p.4.
      GM Heritage factory kit — 1989 Chevrolet Astro Van, p.6.
      GM Heritage factory kit — 1990 Chevrolet Astro Van, p.7.
      GM Heritage factory kit — 1992 Chevrolet Astro Van, p.12.
      GM Heritage factory kit — 1993 Chevrolet Astro Van, p.12.
      GM Heritage factory kit — 1994 Chevrolet Astro Van, p.10.
    Sierra — Square body (1983–1991)
    • 1987 Factory-verified

      shared platform code; cited from the square-body C/K pickup kits; the 1987 option page lists the 4.3 liter (262 cu in) V6 with electronic fuel injection

      GM Heritage factory kit — 1987 Chevrolet Truck, p.51.
    Sonoma — first generation (1982–1993)
    • 1988–1993 Single-source

      1988–1990 from the joint S-10/S-15 pages; the 1991–1993 kit pages are Chevrolet pages; Sonoma years: Wikipedia's S-series engine table 1988–1993; Wikipedia names the 1991 Syclone's turbocharged 4.3L V6 LB4; shared S-series code; 1991–1993 rests on the Chevrolet-only S-10 books, so the row is single-source

      GM Heritage factory kit — 1988 Chevrolet S 10, p.30.
      GM Heritage factory kit — 1989 Chevrolet S 10, p.22.
      GM Heritage factory kit — 1990 Chevrolet S 10, p.30.
      GM Heritage factory kit — 1991 Chevrolet S 10, p.9.
      GM Heritage factory kit — 1992 Chevrolet S 10, p.16.
      GM Heritage factory kit — 1993 Chevrolet S 10, p.6.
    Vandura and Rally — Second generation G-series (1983–1996)
    • 1987–1996 Single-source

      262 cu in; the 1992 (p.9) and 1996 (p.81) powertrain charts list throttle body injection (TBI); shared G-van platform code; cited from the Chevrolet G-Van kit; 1991–1996 rests on the Chevrolet-only G-Van books, so the row is single-source

      GM Heritage factory kit — 1987 Chevrolet G Van, p.14.
      GM Heritage factory kit — 1988 Chevrolet Vandura, p.9.
      GM Heritage factory kit — 1989 Chevrolet G Van, p.16.
      GM Heritage factory kit — 1990 Chevrolet G Van, p.6.
      GM Heritage factory kit — 1991 Chevrolet G Van, p.9.
      GM Heritage factory kit — 1992 Chevrolet G Van, p.9.
      GM Heritage factory kit — 1993 Chevrolet G Van, p.15.
      GM Heritage factory kit — 1994 Chevrolet G Van, p.17.
      GM Heritage factory kit — 1995 Chevrolet G Van, p.3.
      GM Heritage factory kit — 1996 Chevrolet G Van, p.44.
      GM Heritage factory kit — 1996 Chevrolet G Van, p.81.

    Related codes · mentioned in these notes

    262

    This page aggregates every documented appearance of LB4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.