I can answer any basic questions pertaining to general maintenance of a gm vehicle. I can also elaborate on some more advance topics, such as changing radios and replacing windows and running switches for such. As far as actually breaking down the car, I am knowledged and experienced in alternators, batteries, heating and cooling and replacing head gaskets.
I am experienced in all of the above. I've never been to a technical school for what I know, just all from having not had any other option but to learn how to fix car right; because no one wants to have to do it twice