Chevy Colorado & GMC Canyon - View Single Post - RPM and Speedo needle fluttering
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post #9 of (permalink) Old 04-21-2017, 04:28 PM
captain.russ
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Join Date: Aug 2015
Location: New Jersey Maryland
Posts: 338
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I have seen an In-line filter that flattens out the electrical signal to the gauges. The last I saw was on a Buick Grand National. but I bet they are still used. I think I can send you a wiring diagram for your colorado.
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