You can actually take it in and have it set for whatever oil change milage you want. I had mine turned off when I went in for a flash and the procedure that James gave you will work to shut it off. Welcome to the site you all!

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2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10