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02 LTZ tach needle jumping


cableguy4k
09-10-2009, 12:10 PM
The needle on my tach has started jumping around. It happens at varying RPM's, even at idle. It does not happen consistantly. Any thoughts?
maxwedge
09-10-2009, 12:38 PM
Usually caused by the stepper motor in the tach, but check the common ground on the l/s of the block first.

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