So as long as I've had my car whenever i have the heat on or the temp selector set to the hot side my car runs about 15 degrees hotter. it never overheats but just runs hotter than it does when the heat is off. Is this normal? Does anyone else have this issue? the temp gauge will usually sit right around 195 to 205 but with the heat on it will creep up to around 215 to 220 and sit there. any thoughts?

Its a 01 sunfire with the 2200 by the way. forgot to add that.

My cav does the same thing. I just noticed it