The AutoVE Tutorial recommends upgrading to a 2001 or later OS.
In downloads, we have Custom cal, custom tun, stock cal for all years, or go to Stealthv for a stock C5 2001 or later OS.
I have a 99 C5 and I want to update my PCM to a 2001 or later, how about a simple explanation on all these choices.
This would make a nice sticky.

Thanks, Curt