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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

    Chevrolet · Regular Production Option

    Axle, rear, standard ratio

    Years 1973–89, 1993, 1998–08 Models 13 Factory citations 62
    Query this via API →

    Also described as Standard (open) rear axle ratioAxle, rear, standard, non-lockingAxle, rear, standardAxle, rear, 4.10 ratioAxle, standard ratio

    Also documented for BuickGMCOldsmobilePontiacSaturn

    Documented applications

    Astro — First generation (1985–1994)
    • 1986–1988, 1993 Factory-verified

      power team charts; the 1993 order guide lists it as the base rear axle.

      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 — 1993 Chevrolet Astro Van, p.12.
    Blazer (full-size, K5) — Square body (1983–1991)
    • 1983–1986 Factory-verified

      the power team charts print it in every team; the wording is GM's own list wording (the S-10 Blazer and GMT400 Blazer docs); 73-87.com also reads it as the standard (non-Positraction) rear axle

      GM Heritage factory kit — 1983 Chevrolet Blazer, p.4.
      GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.4.
      GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.6.
      GM Heritage factory kit — 1986 Chevrolet Blazer, p.6.
    S-10 Blazer — 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; GM's RPO lists read GQ1 as the standard rear axle ratio

      GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.4.
      GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.20.
      GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.29.
      GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.15.
      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.
    C/K pickup — Square body (1983–1991)
    • 1983–1987 Single-source

      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.
    Chevy Van — Second generation G-series (1983–1996)
    • 1983, 1984, 1986–1989, 1993 Factory-verified

      power team charts; the 1993 order guides list it as the base rear axle.

      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.
      GM Heritage factory kit — 1993 Chevrolet G Van, p.12.
    Motor Home chassis (1983–1998)
    • 1983–1989 Factory-verified

      power teams chart lists it as the 4.10 column; later kits print GT5 for 4.10

      GM Heritage factory kit — 1983 Chevrolet Motorhome, p.5.
      GM Heritage factory kit — 1984 Chevrolet Motorhome, p.7.
      GM Heritage factory kit — 1985 Chevrolet Motorhome, p.13.
      GM Heritage factory kit — 1986 Chevrolet Motorhome, p.7.
      GM Heritage factory kit — 1987 Chevrolet Motorhome, p.11.
      GM Heritage factory kit — 1988 Chevrolet Motorhome, p.7.
      GM Heritage factory kit — 1989 Chevrolet Motorhome, p.9.
    S-10 pickup — First generation (1982–1993)
    • 1982–1989 Factory-verified

      the power team charts print GQ1 in the standard ratio column beside the optional ratio codes

      GM Heritage factory kit — 1982 Chevrolet S 10, p.5.
      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.16.
      GM Heritage factory kit — 1989 Chevrolet S 10, p.40.
    Suburban — Square body (1983–1991)
    • 1983–1988 Factory-verified

      the power team charts print it in nearly every team; the wording follows the merged K5 Blazer square-body doc; 73-87.com reads it as the standard (non-Positraction) rear axle; the 1989 option page prints the standard ratio as GOI

      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.
    Venture — U-body minivan (1997–2005)

    Related codes · mentioned in these notes

    GT5

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