Water dripping from tail pipe GMC Yukon

5 messages, Last post on Mar 02, 2009 at 7:20 PM

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What is this discussion about? GMC Yukon, SUV

#4 of 5 Re: WATER DRIPPING FROM TAIL PIPE [cherryrandle] by rsht Feb 18, 2007 (4:44 am)
Replying to: cherryrandle (Feb 16, 2007 7:57 pm) I am very much in agreement with "ahightower" and "tidester". In every street legal vehicle (I believe as of 1976) equipped with a Catalytic Convertor (a section of an exhaust system) will introduce water vapor out of an exhaust pipe, that is as engine pollutants (carbon monoxide, hydrocarbons, and oxides of nitrogen) passes through a Catalytic Convertor, the catalyst in a converter promotes chemical reactions for the conversion of emission gas (pollutants) to carbon dioxide, nitrogen, and you guessed it, "water".
#5 of 5 2001 Yukon won't stop blowing hot air! by shadetreemonk Mar 02, 2009 (7:20 pm)
My wife's yukon with front and rear climate controls won't stop with the heat in the front. Working with the HAYNES repair manual I believe I have found the cause. The "Front temp. door module" controller may have gotten stuck. After pulling it apart and putting it back together the motor controller moves a "little bit", while in hand, while adjusting the temp dial. When it is installed it is not enough to move the door. The door moves freely by hand. What volt readings should I get at the plug or is there a way of testing the controller? Thanks for the help. Oh yea the back blows hot or cool on demand.