So, honestly I can't remember that far back. But I looked at my emails, and it appears they gave me some instructions from the manual to follow and it must have worked. Honestly I don't even know where the gauge is anymore. I know I was using it up until the day I traded my T in.steve I'm resurrecting your UltraGauge post to see how you made out with it. I have a 06 than I want to know my DTE as I'm missing that from my last truck.