rpm output.

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12-21-2010, 08:04 PM

#11

1Bear

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Once you knew what signal your existing tach is needing, and once you know the signal type from the new ECM, it could be as simple as purchasing a tach signal adapter from a manufacturer such as MSD, Autometer or others.

Last edited by 1Bear; 12-21-2010 at 08:28 PM.

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12-21-2010, 08:12 PM

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youngbuck

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So how do i findout what signal it needs?

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12-21-2010, 08:13 PM

#13

youngbuck

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And its an 04 tahoe ecu

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12-22-2010, 11:55 PM

#14

brandon6.0

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so are you saying that u spliced the white tach wire and ran it to your 93 gauge panel? or did u run it to a 99-newer gauge cluster?

If it is hooked up to your 93 gauge cluster, it might be wrong signal pulse or something.

I just installed a 5" tach. And u do have to run the tach on a 4 cyl. pulse for it to work right.