What software works best for GM cars and trucks??

[The Strokes]

I'd like to know which software works for best for GM. I'm currently working on a 2001 Chevy venture with a P0742 code and want to try
figure out other problems it might have. What ODB cable and software? Thanks

[joshplianfield]

I use a tech2, got mine from chinacardiag.com for $350 shipped to the us,