The tach on my 2005 chevy silverado is reading high. What could the problem be?

Asked by Mar 31, 2012 at 08:30 PM about the 2005 Chevrolet Silverado 1500 LS Ext Cab 2WD

Question type: Maintenance & Repair

I have a 2005 chevy silverado 1500 LS and the tachometer is reading high. It is very erratic. It reads anywhere from 1000 RPM high up to pegged high. However high it is when I turn off the engine, is where the tach gets stuck with the engine dead. For example...If it is reading 3000 RPM high, when I turn off the engine, the tach gets stuck at 3000 RPM.

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1,775

most likely the gauge is bad

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