Help Duramax problem

[cuffnup]

Coming back from a trip to florida which i drove down stock...thought i would drive back in the 40 or 65 horse to see a diff. in gas milage..programmed the truck and nothing worked..speed was showing about 65 but i know i was at least 80...and both brake lights came on and the brakes wouldnt work right...abs and emergency brake dummy lights that is ....had to pull over and put it back to stock...now its fine... any bright ideas.....i have used the preditor for a while and the only real problem i have had was with it surging while driving ...which this problem has never been addressed...now this problem...which makes it impossible to drive..what do the experts think

[johan]

What part number is this?

[mikel]

Is this a new problem, as in the unit worked in the truck previously?
Have you changed the wheel/tire size?
If so, did you change the settings in the Predator?

[cuffnup]

the dealer installed a new cluster...it has worked before but had some surging at some speeds...if they reflashed it why would my brakes and lights ack up and speedometer not work...It is a U7186,,,2006 duramax LLY

[mikel]

Can you please post the revision on this tool.

Thanks

[cuffnup]

It is the 1R17...

[mikel]

We addressed an issue in the 1r17 revision where changing the tire size would cause those issues.
Please update to the latest revision to cure this problem.

Thanks

[cuffnup]

I must say i am very sorry...i had to dig on your website to find it but i did...i kept on looking on the front page for the latest updates..now the truck is okay except for the little hesitation but it is not major...if you ever get a chance to test and fix it let me know...thanks