High RMP's on 2003 Chevy TrailBlazer?

Danielle

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I have a 2003 Chevy TrailBlazer, My mom drove it for 5 years and it has also been the family vehicle for that time. Well, that car has been passed down to me, thankfully. It has just over 108,000 miles on it and lately I have noticed funny squeaking noises when I first start it up, But I think that's just because it's cold out.

The RMP Gage has been higher that usual lately, and when I turn it off the gage is stuck a 1, and it's alot higher when I'm driving. This happened a few weeks ago, and then it went back to normal. Should I be worried or os it just the cold weather messing with it? I live in Michigan.
 
sounds like the gear behind the tachometer is wearing out, you may need a new cluster, you can get them on ebay,
 
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