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Anyone hook up an after market tach in your 99 up silverado?

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Old 02-20-2006, 07:55 AM
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Default Anyone hook up an after market tach in your 99 up silverado?
I have an 02 silverado that I need to hook upp an aftermarket tach with a shift light in. Do you guys know what wires I will need to tap into in order to get the tach to work?
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Old 02-20-2006, 03:13 PM
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This is really based on what aftermarket company you are using - you should really talk to them. But, according to Autometer web site, if that is what you are getting:

Tachometer Signal Wire Installation
for 5.3 engine(s)
White wire, pin # 10 of the red connector at the PCM. Set as 4 cylinder.
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Old 02-20-2006, 05:20 PM
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the tach is a faze slim line tach. It should still tie into the same wire on the PCM though correct?
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Old 02-20-2006, 05:57 PM
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you also can use the white wire behind the cluster.
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Old 02-20-2006, 06:57 PM
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Is it a big license plate size tach??
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Old 02-20-2006, 07:02 PM
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not to jack this thread but how does that work cause if you hook up a timming light it does some wierd stuff like on decell
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Old 02-20-2006, 07:03 PM
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5" with shift light but it is only 2" deep
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Old 02-20-2006, 09:32 PM
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Originally Posted by Dark Halo
the tach is a faze slim line tach. It should still tie into the same wire on the PCM though correct?
It all depends on what signal the tach is expecting.
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