Thanks again for the replies and information. So the follow-up question that I have is _must_ I have an MDI? Or, will a more generic adapter work for me? There's a wide range of price point on these adapters, and, to a certain extent, I believe in you get what you pay for. But, some of these units s...

Okay,

I _thought_ that my signature contained my vehicles which I put in when I registered.

I'll look into fixing that.

In the meantime,

2000 Chevy Astro AWD w/ 4.3L Vortec

2003 GMC Sierra 2500 w/6.6L Duramax / Allison

Thanks for the responses.

Hello, I'm very new to the OBD scene. I hope that this is the right place to ask, if not, perhaps someone can point me to the appropriate place. I have been doing a lot of searching online in hopes of getting some information on what hardware is best suited for what I would like to do. For the most ...