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I just got a new 5" tach w/shiftlight, for my 04 silverado 5.3. An I was just wondering how to wire it in on these NBS trucks. I know where the red, black an white wire go, but what do I connect the green wire to, so that it can read my RPMs? I know some of you guys out there have a separate tach, so if you could drop me some info. Thanks
 
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