The sockets used on computers are usually the Molex type, but they are much bigger than the ones GM use for the Hall sensor connection:
![](https://i.imgur.com/Xy6WcOD.png)
Below is the black GM plug next to an even smaller white GM Hall Sensor socket that was used on some early MP5 controllers:
![](http://www.arhservices.co.uk/GoldenMotor/Smart%20Pie/P7312345_zps3e8859b9.JPG)
I don't know who produces the connectors for GM and I think the only way you will get hold of one is from GM in China
(if they are prepared to supply them separately).
Alan