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Tach wire
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10-12-2023, 04:37 PM
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LS short box
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Join Date: Jun 2015
Location: Carlos MN
Posts: 1,951
Re: Tach wire
I've always used Auto Meter tach's on my LS swaps. Yes the ECM sends the signal to the tach. On the back of the tach are dip switches that can be set for 4,6 and 8 cylinder. LS ECM's use the 4 cylinder setting.
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