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So it's just curious how do I add a four or five position switch to a truck I'm tuning. It wasn't in the course and it seems to be what a lot of people want. It's going to be what I want on my truck too when I tune it. I want maybe a factory tune, tow tune, gas mileage tune, and performance tune. Just curious how y'all went about it.
EFIlive and HPTuners both have operating system upgrade tutorials for their custom operating systems. On EFILive you'll search DSP5 for Duramax and CSP4 or CSP5 for the Cumming platforms.
Let me know if there's a specific spot you get stuck.
Nick
