Question about 2003 Chevrolet TrailBlazer

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Clicking sound under the hood of my trailblazzer

The sound comes and goes while the car is in idle.It is a clicking noise and when we took it to the dealer to be checked it did not do it.

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  • Linda Austin Apr 29, 2009

    My 2003 TrailBlazer has been clicking since I bought it and not 1 single mechanic including the dealership has been able to say what it is. It will click when starting and then stop when it feels like it and then start up again. So far it is just annoying but hasn't seemed to cause any problems that I no of. There has been over 12 different ideas as to what it is but I don't think they really know.

  • Anonymous May 01, 2009

    not the ac compressor

  • laossey May 19, 2009

    My '03 TB has been clicking for a very long time too and nobody seems to know why, including the dealership. It hasn't caused any problems so far - been a very good vehicle - but it's very annoying and sometimes pretty loud clicking. It does it a lot but not all the time and sometimes when it is drive (at a slow speed) you can hear the clicking continue.

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Is it the AC clutch? put the defrost on with engine running and open the hood. listen for the AC clutch switching on and off. this is normal. its basicly on the AC compressor.

Posted on Feb 09, 2009

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