HarryB737 has a good point. You may want to read the odometer DTC codes when you enable the sequence...see the attached link:
http://www.hdtimeline.com/diagnosti...ed/728-04_07_hd_dtc_codes_and_activation.html
http://www.hdtimeline.com/diagnosti...ed/728-04_07_hd_dtc_codes_and_activation.html