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Be safe and fix any hardware related issues before reprogramming. Incorrect programming may cause your vehice to malfunction. This video outlines how to use VX-nano and Techline connect to reprogram the first generation Chevrolet Volt. With particlar focus on some troublesome issues you may run into.

In case you keep getting the service high voltage system error in your Chevy Volt or Opel/Vauxhall Ampera you may consider installing this coolant sensor defeat plug. This is a description of how I went about installing it myself. The video is not sponsored in any way.

For emergencies only. I do not recommend anyone to do this unless absolutely neccessary.