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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    GM3 Factory-verified

    Pontiac · Regular Production Option

    Axle, rear, 3.45 ratio

    Years 1987–89 Models 1 Factory citations 1
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    Also documented for CadillacChevrolet

    Documented applications

    Firebird — Third generation (1982–1992)
    • 1987–1989 Factory-verified

      3rdgenformula names a Borg-Warner 9-bolt axle; Wikipedia pairs it with the LB9, MM5 and N10; Firebird years: Wikipedia 1989; 3rdgenformula option pages 1987–1989; shared F-body code; cited from the Camaro kits

      GM Heritage factory kit — 1989 Chevrolet Camaro, p.27.

    Related codes · mentioned in these notes

    LB9MM5N10

    This page aggregates every documented appearance of GM3 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.