I just got a 2017 with 24,500 miles and I'm hooked on it! For me, it puts conventional cars to shame. But as much as I love it, I hate it. I find the volume of the start-up sound to be an assault on my senses and must find a solution. The only thing I can think of is to disconnect the speaker wires and use an after-market head unit. How friendly is the 2017 Bolt (EV LT) to upgrading the audio system? (the first part of my question was implied, but I think that I should be explicit: Is it possible to disable or at least soften the sound heard during start-up and shut-down?)