I bought the truck used, but was expecting the tune to be stock since the speedo is 20% off due to the big wheels/tires. It came from a dealership, so I have no way of finding out what was done to the tune. Is there any way you can see what was all changed in the tune? Probably not, but worth a shot ...

Thanks. It's much appreciated

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Well, I called support on Tuesday and the guy said he'd have someone look at this... 4 days since without a reply, so I guess there's no support staff working this week who can do anything about it. I realize it's between holiday weekends, but I expected I'd get some kind of support this week...

As a follow-up question, my truck has 255/70R22.5 tires on Alcoa wheels -- 37" diameter. I do the math in my head to add about 20% to the speedometer reading to get my actual speed. Can you suggest speedometer settings to get me close when I do put the tune into my truck?

Thanks

I have a 2006 GMC 3500 that I'm trying to tune. The tuner says "Predator was able to read a backup. You will need to export the backup using DS Downloader and call (866)396-6614 x1"

I updated the tuner to the latest version and still no luck. Below should be all the needed information. If not ...