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• 10:39, 6 July 2026 Cliff talk contribs created page ALDL diagnostics (Created page with "'''ALDL diagnostics''' is an overview of Assembly Line Diagnostic Link diagnostic access on the Pontiac Fiero. The Fiero uses a GM ALDL diagnostic connector that allows diagnostic trouble codes and engine control information to be accessed from the engine control system. == Overview == ALDL stands for Assembly Line Diagnostic Link. It was GM's diagnostic interface before modern OBD-II systems. On the Fiero, the ALDL connector can be used to read diagnostic troubl...")