Question about 2005 Chevrolet Monte Carlo
If all the other gauges are reading correctly and everything else seems to be working normally then the tiny servo motor in the dash that moves the tachometer needle may be going bad. If it is, then the dash would have to be removed and repaired to fix the problem. I've seen several of these servos go bad over the years and the symptoms you are describing are usually the same that I see when this happens. You may wish to have a good shop hook up to the control system and see if there are any problems that could be causing the servo to actually move in this way for a reason but it's most likely the servo itself that is failing. Hope this helps you find your problem!
Posted on Jul 12, 2010
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Posted on Jan 02, 2017
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