EGR solenoid test
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Unplug the EGR solenoid. Then take a 9v battery and connect a wire to each post on the battery.
![](https://www.gmforum.com/howto/tech/DSC02752.jpg)
Now take those wires and touch them to the two outside terminals. One on each side.
![](https://www.gmforum.com/howto/tech/DSC02753.jpg)
You should feel the solenoid click. If you can't feel it moving, the solenoid is bad.
![](https://www.gmforum.com/howto/tech/DSC02752.jpg)
Now take those wires and touch them to the two outside terminals. One on each side.
![](https://www.gmforum.com/howto/tech/DSC02753.jpg)
You should feel the solenoid click. If you can't feel it moving, the solenoid is bad.
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