GM EFI Tuning Beginners Guide DVD
Main debate was price. Obviously 18 pages of debate tells you something.
Tuning still takes a lot work and few are willing to publish material for free (or budget-minded). You might contact the Author. I think he gives credit if you attend one of his classes.
I learned tuning the hard way (trial and error, forums, asking questions) so perhaps others can comment more fairly on its value.
Good luck.
..WeathermanShawn..



