Question about 2004 Chevrolet TrailBlazer
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Posted on Jan 02, 2017
Your switch acts as a reastat which adjusts your speeds your switch is going bad so you only have the two speeds left on that reastat.. thanks Jerry
Posted on Apr 22, 2009
Sounds like your water pump is going out or your thermostat is stuck. Check the thermostat first and make sure it is not frozen in the clsed position.
Posted on May 08, 2009
most gm cars use electrily controled temp actuator door on top of center of heater case . if move the temp lever to hot or cold you should see the door arm move sometimes the arm will move but the door dosent there is three wires too the motor one 12 volt one ground and one return to the hvac modle head controls there are different colors for the return wire.basically you can un hook the arm and move it manunlly to see if it makes a difference at the vent while the ac system is on.the way test for the problem is to check the voltage on the return wire at the motor and ground with a dvm meter you should see a vary voltage when slide temp controls from hot to cold . more than likey it is hvac control head but check first they are costly.
Posted on Jun 21, 2009
Replace the blower motor resistor. It is next to the blower motor.Should be on the passengers side under the dash panel.Good luck.
Posted on Nov 18, 2009
The fan clutch isnt engaged at all times, therefore it may be normal to hold it in place (not recommended). On these trailblazer's 4.2L engine the fan clutch is electronically controlled. Usually when this vehicle's fan clutch malfunctions, there is a random ticking noise while idling or at a stop, also the "service engine soon" may turn on. As for the the fan speed problem, this may be a faulty blower resistor malf (typical) or climate control unit may be faulty. Hopefully this helps!!
Posted on May 05, 2010
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