Question about 1995 Chevrolet Tahoe

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Code reading I have a chevy tahoe, truck is making a high pitch squeal, replaced water pump, alternater and still making that noise(its like a tea kettle left whistling on stove Noise). I got a reading of a 3-7 what does that mean?

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  • brian c
    brian c May 11, 2010

    What is the 8th digit of your VIN number and engine size?

    I know this sounds like an odd question, but GM OBD1 codes are VIN specific.


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  • Master
  • 360 Answers

Replace the serp belt and check idler and tentioner pullys. serp belts make noise after antifreeze or oil has been on them. good luck

Posted on Sep 23, 2008

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Posted on Jan 02, 2017

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