If you have a Jeep Grand Cherokee 1999-2004 model and you dont want to buy the info, look on the web or follow the simple instructions below.
This is free:
On the over head computer display console, press "Step" repeatedly until you get to the "service in.......miles/KMS" once this display is up, press and hold the "Reset" button and it will reset the service warning and put your service interval mileage back to the standard mileage.
It will also stop the 4 beeps after start up that drive me mad !!
It is that simple !!
Hope this helps some people.