Roger, I've already got the Torque Pro app on my Galaxy S II and the Elm 327 OBD reader. It's soooo cool, in fact, I brought it to work this morning to show the guys, had it connected and running in 'Realtime' all the way to work. Granted the Blazer isn't a speed demon but it was fun checking out the 0-60mph time, ¼ mile e.t, vacuum readings, throttle position, etc. Just a couple of days ago my wife said the MIL came on in her vehicle, I scanned the DTC code, tightened the loose gas cap, cleared the code and all is well now. At $24 for the Elm 327 and $4.95 for the app, this thing is cheap, fun and educational at the same time.

If you are serious about snagging it, I can offer advise on the best Elm 327 to get, the China knock offs have a bad rap.

Mike