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TrailBlazer 2002-2009
The TrailBlazer, originally introduced as an upscale Blazer, was produced from 2002 to 2008 with a powerful I6 engine and with a monster V8 offered in the Trailblazer SS
Platform: GMT 305, 360, & 370.

No heat

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Old December 17th, 2017, 1:06 PM
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I have a 2006 Trailblazer 4.2L. First we would get heat out of the passenger side but not the driver side. Reset the actuators and heat worked perfect for about a day. Now no heat again. Trying to find the actuator(s) responsible for this issue. Any ideas here?
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Old December 17th, 2017, 2:50 PM
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Might be under the center dashboard, they are on suburban.
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Old December 27th, 2017, 8:38 AM
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youtube it, Im sure there are many videos on this as it is a very common failure item on this platform .
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