Good luck, and it takes some luck. Once I got it on the first try. Other times it has taken 50 tries over 2 weeks. I think it has a lot to do with how clean the switch contacts are. If it is hard to get the trip odometer to reset, it is impossible to get the service warning to reset. I found it helps to hold the switch in and rotate back and forth many times, dash dimmer rotation, just to clean the contacts a little before trying the service reset. Also makes the trip reset easier.