I've got a buddy in need of help with his car, and he's got a Grand Am/Prix or the like. What devices are available to the GM OBD are you guys familiar with?

What year is it?

If it's a later OBD II car, I've got a friend that running a mid 12 sec supercharged Prix. I can find out what software he's running to tune on his laptop.

Is it broken and in need of a tune-up, or is he looking to "toon" it?

Oh crap. I posted another reply to this earlier today, but the computers at work were acting wierd. It's an '01, and he was having some problems with an injector misfiring. He had the code pulled at some service place, and they said the #3 injector was the culprit. Well, he paid about $50 to have the injectors "cleaned" (dumping some solution through the intake) and nothing was fixed. I pulled the injectors off for him, soaked them with carb cleaner, smacked the residue out of them, and viola: smooth running.

So yes, I just wanted something to help with common maintenance issues.