'88 Blazer Tachometer

[jetfxr03]

The tach in my Blazer is reading high. It has slowly been increasing over time. Right now it reads 1900 rpm at idle and over redline when I shift. Can the tach be adjusted to read correctly or is it slowly dying and must be replaced?

[Rbraczyk]

My speedo is five over, and maybe the fact is that it has 277K on it. It can be adjusted, but i would just replace it.

[jetfxr03]

Originally Posted by Rbraczyk

My speedo is five over, and maybe the fact is that it has 277K on it. It can be adjusted, but i would just replace it.

The speedometer actually reads about 5 mph low because of the taller tires on the vehicle. My question was about the tachometer, you know, the thingy that shows RPM just to the right of the speedo.