Question about 2004 Chevrolet TrailBlazer
I just found the problem and wanted to post this for anyone who can use this info. I replaced the thermostat, and still had a leak with no fluid coming from the overflow. fyi- There's a air/heater valve under there. Maybe someone may know why this is leaking or maybe it just went bad.;)
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Posted on Jan 02, 2017
If it's your heater core, unless you're a mechanic you probably should get professional help. The heater core is located on the firewall and many parts need to be replaced to get to it. Do you see water on the floor inside the vehicle, Many times a heater core will leak inside.
Posted on Mar 12, 2009
I have the diagram you need. If you send me your email I will scan it off and send it to you. email@example.com
Posted on Sep 12, 2009
In addition to faulty actuator motors, the blend door itself can also be broken. This happened on my Tahoe. Typically it is a very labor intensive and costly fix to replace a broken blend door, as the dash must be removed and the plenum assembly replaced. There is a DIY kit from heatertreater.net that provides steel hardware as well as instructions on how to perform the repair by removing the glove box rather than the entire dash.
This is also an alternative to replacing the 'difficult to access' top actuator motor underneath the dash. The kit contains a single blend door which converts the dual control to single control, and is operated off of the bottom actuator motor, which can be accessed by removing the glovebox. If you are having issues with your blend door, or the 'top blend door actuator motor behind the dash' it is worth looking into.
Posted on Dec 14, 2011
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