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All are not created equal the pcmhacking.net one is by far the best followed by envious customs .for vr vs it' not much of an issue but if you want to use them on later models like vx vy or do stuff with envious customs software then avoid eBay they can be real slow cables and not work well if at all on the later models.plus if you buy pcmhacking gear you get full support via the seller and the forum if you have any issues with your eBay cable youre pretty much on your own troubleshooting issues
I'm bit confused. I have an obd2 scan tool..sure it's doesn't work on my 03 Commodore vy 3.8l. Do I need to buy only a ALDL cable and fit to existing scan tool or do I need to buy whole New scan tool with ALDL cable? Thanks for the help guys.