I don't remember the TSB that was performed but it was a software update which I believe reprogrammed the engine and electric motors. I noticed after this was done the engine ran smoother, the mpg's improvement was also noticeable. I recall some in this forum had their 2016 Volt that would when running on gas chuggle. We had a similar problem with our Volt, to me it was more of not being smooth.
After the service was performed I told the Chevy Service Manager of the improvement. He stated that another Volt owner who had the same service done also told him the same improvement with their Volt.
After the service was performed I told the Chevy Service Manager of the improvement. He stated that another Volt owner who had the same service done also told him the same improvement with their Volt.
