Another 2011 here. Mine does it too, but I have assumed it is supposed to, and it doesn't bother me. If you put it on defrost and it is cold out, it'll ramp up to fan setting 3 automatically, but if you turn the fan speed dial after setting defrost, it'll override it.
Another nice feature is that if your fan is set higher than 2, if your activate your handsfree (phone via Bluetooth or OnStar), it automatically dials back the fan to 2 unless you override it.
Another nice feature is that if your fan is set higher than 2, if your activate your handsfree (phone via Bluetooth or OnStar), it automatically dials back the fan to 2 unless you override it.
