Page 330 in the 2016 manual. 100 lb ft
Yep, my 2012 Cruze Jack Kit wrench fits my Gen 1 Volt lug nuts perfectly.Another option is to get a used CTS wrench (i know it's the right size for the G1, not sure about g2). I found that GM made the wrench just long enough that when you cannot tighten any more, it is about the right torque. I've checked it with a torque wrench and it works.
I too hate placed that impact wrench everything. Every time I have warped brake rotors, it can be linked to someone messing with my wheels with an impact wrench. That's why I avoid letting the dealerships and tire shops rotate my tires. In fact I stopped rotating my tires altogether.