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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    GQ1 Factory-verified

    GMC · Regular Production Option

    Axle, rear, standard ratio

    Years 1983–89 Models 7 Factory citations 38
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    Also described as Axle, rear, standard, non-lockingAxle, rear, standard

    Also documented for BuickChevroletOldsmobilePontiacSaturn

    Documented applications

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

      the power team charts print it in every team; 73-87.com reads it as the standard (non-Positraction) rear axle; shared square-body platform code; cited from the Chevrolet Blazer kit

      GM Heritage factory kit — 1983 Chevrolet Blazer, p.4.
      GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.12.
      GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.6.
      GM Heritage factory kit — 1986 Chevrolet Blazer, p.6.
    Jimmy — first generation (1983–1994)
    • 1983–1989 Factory-verified

      the power team charts print GQ1 in the standard ratio column of each team beside the optional ratio code; 1989 from the joint data book weight page; shared S/T platform code; cited from the joint S-10/15 Blazer/Jimmy pages of the S-10 Blazer kit

      GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.4.
      GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.4.
      GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.10.
      GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.4.
      GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.40.
      GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.4.
      GM Heritage factory kit — 1989 Chevrolet Blazer, p.15.
    Safari — First generation (1985–1994)
    • 1986–1988 Factory-verified

      power team charts; shared M-body code; cited from the joint Astro/Safari pages of 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.
    Sierra — Square body (1983–1991)
    • 1983–1987 Single-source

      shared platform code; cited from the square-body C/K pickup kits; the power team charts print it in nearly every team; the meaning comes from 73-87.com, which reads it as the standard (non-Positraction) rear axle

      GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
      GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
      GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
      GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
      GM Heritage factory kit — 1987 Chevrolet Truck, p.37.
    Sonoma — first generation (1982–1993)
    • 1983–1989 Factory-verified

      the power team charts print GQ1 in the standard ratio column beside the optional ratio codes; 1989 from the joint data book's weight page; shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

      GM Heritage factory kit — 1983 Chevrolet S 10, p.37.
      GM Heritage factory kit — 1984 Chevrolet S 10, p.8.
      GM Heritage factory kit — 1985 Chevrolet S 10, p.16.
      GM Heritage factory kit — 1986 Chevrolet S 10, p.8.
      GM Heritage factory kit — 1987 Chevrolet S 10, p.16.
      GM Heritage factory kit — 1988 Chevrolet S 10, p.80.
      GM Heritage factory kit — 1989 Chevrolet S 10, p.20.
    Suburban — Square body (1983–1991)
    • 1983–1988 Factory-verified

      the power team charts print it in nearly every team; 73-87.com reads it as the standard (non-Positraction) rear axle; the 1989 option page prints the standard ratio as GOI; shared square-body platform code; cited from the Chevrolet Suburban kit

      GM Heritage factory kit — 1983 Chevrolet Suburban, p.6.
      GM Heritage factory kit — 1984 Chevrolet Suburban, p.9.
      GM Heritage factory kit — 1985 Chevrolet Suburban, p.9.
      GM Heritage factory kit — 1986 Chevrolet Suburban, p.8.
      GM Heritage factory kit — 1987 Chevrolet Suburban, p.15.
      GM Heritage factory kit — 1988 Chevrolet Suburban, p.9.
    Vandura and Rally — Second generation G-series (1983–1996)
    • 1983, 1984, 1986–1989 Factory-verified

      power team charts; shared G-van platform code; cited from the Chevrolet G-Van kit

      GM Heritage factory kit — 1983 Chevrolet Vandura, p.6.
      GM Heritage factory kit — 1984 Chevrolet G Van, p.8.
      GM Heritage factory kit — 1986 Chevrolet G Van, p.15.
      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.17.

    This page aggregates every documented appearance of GQ1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.