Its in the manual.With car off put key to foward position when miles comes up click the button(reset button for odometer)till oil life comes up then press and hold for a few seconds... that should do it.The acual miles on truck will stay the same it does not reset to 0 .It should have been reset at oil change bring it to there attention next time in. Make sure you sign up online and you will get a monthly report from on star. 
__________________
H3 gray adventure,brushguard,hood handles,sunroof,steps,crossbows,smokers package,window/sunroof visor,Airbrushed spare tire cover,mudflaps,K&N filter,SS Hummer insert,Hummer rubber mats,cargo rubber mat + shade,12 volt airhorn,eclipse nav/dvd/rear camera/mini remote,autostart,12 volt fridge,high beam garage remote,underhood air compressor, taillight bezels ,clinometer ,trailer brake and hitch.
|