Question about 2003 Chevrolet TrailBlazer

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My 2003 TrailBlazer has a foul smell from the air system. What could be causing this smell? It's a sour smell not a dead animal smell. Is there a cabin air filter? I've read several posts and some say there is and some say there isn't.

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You can buy a deoderiser that kills all known airborn nasties,you spray it into the air inlet of any aircon unit,the only smell that it will NOT get rid of is cigarette smoke.that sticks to the filter/condenser and all the vents...nasty.

Posted on Aug 25, 2010

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Your critters could have pooped and peeed in your Ductwork. This may be covered by your Comprehensive Insurance as it is a Health Hazard. Call your Agent, really, call your Agent.

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I would then think of a leaking hose connection, bad plug wire, weak spark, etc.
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On top of the intake for the air, you most likely have some kind of dead animal. Rat,etc....A lot of the air intakes for the air in the car are up by the windshield. Remove the paneling under the windshield wipers and look for a filter or the dead animal might be right there. Mike.

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Auto zone sells stuff that you can buy if its just mold in the vent housings and in the air ducts. you have yo run the heater on hot and high to ge the moisture out then after you run it for 15-20 min spray the mildew killer in to it. .....Best of Irish luck to you on that one, it took me a month to find that mouse.

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