Question about 2005 GMC Sierra

1 Answer

My heater only blows hot on the passenger side

I changed the control and the actuator

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1 Answer

You first have to find a problem-- before
any parts changing takes place

So you have no factory service manuals-- I assume,
to learn about the system with the problem & trouble
charts to follow to find a problem !

The problem is about the HVAC Blend Doors not working
correctly & you have to do the required testing for the answer

Posted on Dec 03, 2014

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Posted on Jan 02, 2017

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1 Answer

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The air temperature actuator is a 3 wire bi-directional electric motor. Ignition 3-voltage, ground and control circuits enable the actuator to operate. The control circuit uses a 0-12 volt linear-ramped signal to command the actuator movement. The 0 and 12-volt control values represent the opposite limits of the actuator range of motion. The values in between 0 and 12 volts correspond to the positions between the limits.
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Vehicle: 2004 chevy silverado problem: when i run the a/c, the drivers side vents work fine but the passenger side vents will not blow anything but HOT air. I did recently wire a couple of aftermarket...


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