One problem related to wiring has been reported for the 2007 Saturn ION. The most recently reported issues are listed below.
Car will not shut off, after contacting dealer was advised to disconnect the wiring harness from the battery. Wheel sporadically locks up while driving which can causes you to loose control of the vehicle. No warning lights come on at all. Previously had this same issue with power steering in December which went out and almost caused an accident. Gm has recalled several vehicles for this same safety hazard however did not include Saturns in the recall.