Question about 2005 Chevrolet TrailBlazer
Had the same problem it's a secondary air injection pump easy to replace look under the trailblazer about where the seats are underneath and you'll see a round black plastic thing with two hoses running to it that's it. it whistles because it's bad. i got mine on amazon about $145 it's worth it not to hear it again. good luck!
Posted on May 01, 2013
Replace the fan clutch on your radiator fan.
Posted on Aug 26, 2010
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Posted on Jan 02, 2017
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