Custom Display on instrument panel?

I was flipping through the info nn my 2002 Cadillac SLS instrument display. and after the engine oil life I get somthing that says "SONJA No. 1" is that custom? if so how can I change it? thanks

I believe only the dealership can program the display. The next time you are at the dealer inform them of what you want it to say and they'll program it for you.