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Old Yesterday, 08:11 PM   #1
K25alive
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Tach Filter GM 14020025

I see this Tach Filter was offered on CK trucks from 75-81. I have a 76/77 gauge cluster with tach that I want to swap with my non-tach gauge cluster (into a 77 C10). Question is, must I use one of these tach filters? And if so, where is it mounted? Is it mounted to the intake manifold? I do not want to fry the tach, just had it refaced, cleaned and calibrated for a pretty penny.
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Old Yesterday, 10:07 PM   #2
hatzie
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Re: Tach Filter GM 14020025

I'm not sure that you need one.
The 1983 wiring diagrams show what's inside the filter. You can build one.
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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Old Yesterday, 11:09 PM   #3
Factory Guy
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Re: Tach Filter GM 14020025

I would ask your restorer of your gauges if it needs a tach filter, My guess is it doesn't, unless you get "tach noise" I wouldn't worry about installing a filter. I have installed a bunch of tachs over the years and I have never installed a filter on ANY.
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