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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    MX1 Factory-verified

    Chevrolet · Regular Production Option

    Transmission, 3 speed automatic

    Years 1970–02 Models 25 Factory citations 90
    Query this via API →

    Also described as 3-speed automatic transmissionAutomatic transmission3-speed automatic (merchandising)Automatic transmission, 3 speed (merchandising code for the THM 125C)Transmission, automatic 3 speedTransmission, 3-speed automatic (merchandised order code)Automatic transmission, 3-speed (merchandising code for the THM 125C)Transmission, automatic, 3 speed, merchandising codeTransmission, automatic, merchandised provisionsMerchandised transaxle, automatic provisions

    Also documented for BuickGMCOldsmobilePontiacSaturn

    Documented applications

    Corvette (C3)
    • 1978 Factory-verified

      $0.00; 38,614 built

      GM Heritage factory kit — 1978 Chevrolet Corvette, p.22.
    • 1979 Factory-verified

      $0.00; 41,454 built (price and count: Corvette Black Book)

      GM Heritage factory kit — 1979 Chevrolet Corvette, p.34.
    • 1980 Factory-verified

      $0.00; 34,838 built

      GM Heritage factory kit — 1980 Chevrolet Corvette, p.59.
    • 1981 Factory-verified

      $0.00; no count given by CAC (others omit the line); factory kit lists RPO MX1 on the option index (p.5)

      GM Heritage factory kit — 1981 Chevrolet Corvette, p.5.
    Beretta — L-body (1987–1996)
    • 1990, 1994–1996 Factory-verified

      the order-guide code for the 3 speed automatic; with the LM3 or LN2; same description as cavalier-gen2 and cavalier-gen1; cavalier-gen3 reads MX1 as "Transmission, 3-speed automatic (merchandised order code)"

      GM Heritage factory kit — 1990 Chevrolet Beretta, p.9.
      GM Heritage factory kit — 1994 Chevrolet Beretta, p.10.
      GM Heritage factory kit — 1995 Chevrolet Beretta, p.10.
      GM Heritage factory kit — 1996 Chevrolet Beretta, p.16.
    S-10 Blazer — First generation (1983–1994)
    • 1983, 1987 Factory-verified

      only in: 2WD; the 1983 page offers it only with YF5 California emissions and the 1.9L engine

      GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.6.
      GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.42.
    Cavalier — first generation (1982–1987)
    • 1984, 1986–1987 Factory-verified

      the ordering code for the unit the power team pages call MD9; the 1985 option line is cut off after MX, so 1985 is left out; the 1986 page prints MXI (letter I)

      GM Heritage factory kit — 1984 Chevrolet Cavalier, p.11.
      GM Heritage factory kit — 1986 Chevrolet Cavalier, p.37.
      GM Heritage factory kit — 1987 Chevrolet Cavalier, p.37.
    Cavalier — second generation (1988–1994)
    • 1989, 1991–1992, 1994 Factory-verified

      the ordering code for the unit the MVMA pages call MD9; the Cavalier third-generation doc reads MX1 as a 3-speed automatic merchandised order code

      GM Heritage factory kit — 1989 Chevrolet Cavalier, p.8.
      GM Heritage factory kit — 1991 Chevrolet Cavalier, p.11.
      GM Heritage factory kit — 1992 Chevrolet Cavalier, p.9.
      GM Heritage factory kit — 1994 Chevrolet Cavalier, p.4.
    Celebrity — A-body (1982–1990)
    • 1985, 1989 Factory-verified

      The ordering code for the unit the power-team pages call MD9; 1986–1988 are not claimed: no dated page of those years prints the code as an entry of its own

      GM Heritage factory kit — 1985 Chevrolet Celebrity, p.43.
      GM Heritage factory kit — 1989 Chevrolet Celebrity, p.6.
    Chevette — T-body (1983–1987)
    • 1985 Factory-verified

      ordering code on the option-weight page, with the L17 engine; the 1984 and 1986 pages print the code as MX) and MX], so those years are not claimed

      GM Heritage factory kit — 1985 Chevrolet Chevette, p.30.
    Citation — X-body (1983–1985)
    • 1984–1985 Factory-verified

      the option line for the automatic, a merchandising option for MD9; the kit pages print MXI

      GM Heritage factory kit — 1984 Chevrolet Citation, p.34.
      GM Heritage factory kit — 1985 Chevrolet Citation, p.33.
    C/K pickup — GMT400 (1988–2000)
    • 1988–1990 Factory-verified

      the 1990 transmission table lists it as the 3 speed automatic the kit pages also print MXI

      GM Heritage factory kit — 1988 Chevrolet Truck, p.22.
      GM Heritage factory kit — 1989 Chevrolet Truck, p.24.
      GM Heritage factory kit — 1990 Chevrolet Truck, p.18.
    C/K pickup — Square body (1983–1991)
    • 1983–1987 Factory-verified

      the kit pages also print MXI

      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.
    Corsica — L-body (1987–1996)
    • 1988–1990, 1993–1996 Factory-verified

      the order-guide code for the 3 speed automatic; requires UA1 with the LL8 (1989); base transmission from 1994; the 1988 option-weight page prints MXI; same description as beretta-gen1

      GM Heritage factory kit — 1988 Chevrolet Corsica, p.32.
      GM Heritage factory kit — 1989 Chevrolet Corsica, p.15.
      GM Heritage factory kit — 1990 Chevrolet Corsica, p.12.
      GM Heritage factory kit — 1993 Chevrolet Corsica, p.32.
      GM Heritage factory kit — 1994 Chevrolet Corsica, p.10.
      GM Heritage factory kit — 1995 Chevrolet Corsica, p.8.
      GM Heritage factory kit — 1996 Chevrolet Corsica, p.6.
    El Camino — fifth generation (1983–1987)
    • 1983–1986 Factory-verified

      Standard; the 1987 order guide prints the 3 speed automatic without its code

      GM Heritage factory kit — 1983 Chevrolet El Camino, p.5.
      GM Heritage factory kit — 1984 Chevrolet El Camino, p.5.
      GM Heritage factory kit — 1985 Chevrolet El Camino, p.11.
      GM Heritage factory kit — 1986 Chevrolet El Camino, p.5.
    Chevy Van — Second generation G-series (1983–1996)
    • 1983, 1984, 1986–1990 Factory-verified
      GM Heritage factory kit — 1983 Chevrolet Vandura, p.13.
      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.20.
      GM Heritage factory kit — 1990 Chevrolet G Van, p.19.
    Lumina APV — U-body (1990–1996)
    • 1990 Factory-verified

      with the LG6; the RPO code the 1990 dealer specifications page gives the 3 speed automatic (the 1990 page names the THM 125 and prints MXI); 1991 is not claimed: the only 1991 page that prints MX1 (powertrain page p.5) prints "1951-" where the model year belongs and is not dated; the MVMA specification pages of 1992–1995 give the 3 speed automatic as MD9 (see MD9)

      GM Heritage factory kit — 1990 Chevrolet LuminaAPV, p.6.
    Monte Carlo — fourth generation (1983–1988)
    • 1985–1987 Factory-verified

      1983 is left out: the 1983 guide and price pages print no transmission code, and the brochure's specification and power-team page (p.19), which prints MXI, prints no model year; 1984 is left out: only the 1984 option price page (p.33, which prints a production date but no model year) and the brochure page (p.21) print MX1; the 1988 guide offers MX0 only, though the 1988 MVMA power-team page still pairs the base LB4 with a 3 speed automatic ('200C') without a code

      GM Heritage factory kit — 1985 Chevrolet Monte Carlo, p.30.
      GM Heritage factory kit — 1986 Chevrolet Monte Carlo, p.32.
      GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.40.
    Motor Home chassis (1983–1998)
    • 1983–1988, 1990 Factory-verified
      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 — 1990 Chevrolet Motorhome, p.11.
    S-10 pickup — First generation (1982–1993)
    • 1982–1984, 1987 Factory-verified

      the 1990 powertrain chart (p.8) prints it only as a column heading whose marks are unreadable, and no 1988–1993 page offers it otherwise, so 1990 is not claimed

      GM Heritage factory kit — 1982 Chevrolet S 10, p.5.
      GM Heritage factory kit — 1983 Chevrolet S 10, p.33.
      GM Heritage factory kit — 1984 Chevrolet S 10, p.9.
      GM Heritage factory kit — 1987 Chevrolet S 10, p.20.
    Sprint — first generation (1985–1988)
    • 1985–1986 Factory-verified

      coupe and Sprint Plus, extra cost; not on the 1986 Sprint ER page; three-speed per the 1986 ordering-information page (p.6); the 1985 ordering page prints MXI

      GM Heritage factory kit — 1985 Chevrolet Sprint, p.8.
      GM Heritage factory kit — 1985 Chevrolet Sprint, p.12.
      GM Heritage factory kit — 1986 Chevrolet Sprint, p.8.
      GM Heritage factory kit — 1986 Chevrolet Sprint, p.10.
      GM Heritage factory kit — 1986 Chevrolet Sprint, p.14.
    Suburban — Square body (1983–1991)
    • 1983–1990 Factory-verified

      only in: 20/2500 series; standard with B3J diesel equipment (1984–1987); 1983 and 1988 from the power team charts; the 1987 page prints MXI

      GM Heritage factory kit — 1983 Chevrolet Suburban, p.7.
      GM Heritage factory kit — 1984 Chevrolet Suburban, p.16.
      GM Heritage factory kit — 1985 Chevrolet Suburban, p.16.
      GM Heritage factory kit — 1986 Chevrolet Suburban, p.15.
      GM Heritage factory kit — 1987 Chevrolet Suburban, p.22.
      GM Heritage factory kit — 1988 Chevrolet Suburban, p.10.
      GM Heritage factory kit — 1989 Chevrolet Suburban, p.17.
      GM Heritage factory kit — 1990 Chevrolet Suburban, p.19.

    Related codes · mentioned in these notes

    B3JCACL17LB4LG6LH0LL8LM3LN2LR8MD9MX0UA1YF5

    This page aggregates every documented appearance of MX1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.