Temp gauge inop on 2005 Chevrolet Venture

My temp gauge is inop. I want to test the gauge sending unit but I cant find it. Where is the location of the temp gauge sending unit? I found the ECT but not the sending unit?

Asked by for the 2005 Chevrolet Venture
The gauge probably gets it's signal from the computer which gets it's info from the ECT. I don't think there's a separate gauge sender...
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