Chevy Colorado & GMC Canyon - View Single Post - RPM and Speedo needle fluttering
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post #5 of (permalink) Old 10-19-2015, 11:33 PM
08Canyon
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Join Date: Oct 2011
Posts: 10,752
The throttle position is still changing although cruise control is set. Any deviation such as wind or grade or just because will force a throttle position change. Granted I suspect it would require noticeable movement before the tach would fluctuate. And speed should be very stable.


Any chance you have electronics that are interfering with the electrical system?
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