Originally Posted by westtnfx4
It will not mess it up. It will say it cant read it if it's vin locked. If its not it will prompt you to continue the program.
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No worries, it will either work or not, but you wont have any problems if it doesnt work.
Just follow the program if it works, and do not interupt it for any reason. Even if you forget to do something it says to do. It will just make you start over. And if you do inturupt it, it could erase everything.
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2001 GMC Sierra 2500HD CCSB 4x4 Duramax/Allison
EFI Live/ DSP5 "MAX EFFORT" thanks to Rob Coddens
Built Trans, Bank's Ram Air Intake, Big Head Wastegate, Banks Intercooler, PPE Boost Valve, Ported Intake Horn, Shimmed FPRV, FASS 150 Lift Pump, 40 overs, Optima RedTops,
20" Forged Alluminum WELD's 33's Nitto Trail Grapplers