Hmmmmm wonder if I can reset service
Reminders
You have not stated which unit you have, but, you can reset as many service reminders as you want, provided you have the "Professional" edition of the GS911.
If you have the "Enthusiast" version you can also reset service reminders, but only the first 10 of them. After that it will not allow any further resets, although you will still be able to use the unit for the "Emergency Functionality"
Hope this makes it clear.