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code 51
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  1. LT1 | LT4 | L99 Engine Tech
    My new-to-me project car is throwing code 51 after running for a couple of minutes. The Service Engine Light takes something like 1 - 3 minutes to display and the only code stored is 51. I'll be replacing the alternator a little later today (seems to have a bad voltage regulator; the lights...
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