Question about 2003 Chevrolet TrailBlazer
Will i have bad news for you, your heater/a/c system is all electronic. ( not like the old days when we seen this there was just a broken vacuum hose ) now all the doors inside the heater system are run by electric motors they call them actuator's now days and they are all controlled by a computer called a HVAC control module, and most likely this is what has went bad on your truck.....sorry
Posted on Mar 13, 2011
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Posted on Jan 02, 2017
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Dec 18, 2013 | 2004 Chevrolet TrailBlazer
Nov 25, 2012 | 2003 Chevrolet Chevrolet TrailBlazer
Oct 23, 2011 | 2003 Chevrolet TrailBlazer
It's most likely a vacuum line, look
under your hood (close to the cowl panel) for a disconnected, cracked
or broken vacuum line.
In some rear cases, it could be the
vacuum switch (in dash). Or vacuum diaphragm (under dash).
Hope this helps you ???
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