Is 210 the normal temp for a 2000 cadillac sedan

Hello there and thank you for choosing fixya :
To answer your question yes the temperature is normal for this vehical 205-210 is right at the normal range Normally you will have the 185-210 deg. thermostate installed in this vehical ''
You should notice that it does go up and you notice that it goes back down around the 210 degree mark this is telling you that the thermostate is working fine ok also if yo notice that it goes up and stayes up over the 210 -then you may have a problem this could be the thermostate may not be operating properly or the radiator may be clogging and needs to be flushed or your antifreeze mixture is not correct ok?
Hope this has helped you out
Best regards Michael