I did a little research and it seem as though there were 1,546,769 Trailblazers built by GM. Of course they made 5.3 and 6.0 models, but I'm sure the lions share were I6. Of course that's not counting the GMC, Olds, Buick, Isuzu, and Saab variations either.
It looks as though we'll have plenty to choose from for years to come.
As far as metric tools go, I can't honestly fathom anybody in this day and age not having any. The Ford Tempos and Chrysler K cars I learned to drive in, back in the 80's were about 1/2 metric then.
