Interesting comments here...Looks like Diablo and Black Bear both have ways around tuning detection...I want to get a tune so bad but am definitely on the fence...hmmm.
With a "Tuner" one should return it to "stock" when going in for service...with the "Speedometer calibrator" is this necessary? Can the Hypertech unit get messed up if the shop flashes your truck?
Thanks again!
What benefit did you notice from your Hypertech speedometer calibrator, beside an accurate speedo? I'm considering buying one instread of an actual programmer. Thanks!