Have the other ignition items been checked, spark plugs, wires, coilpack? Again I've never seen a later model SC have a failed DIS module.A slight miss when idling, and check engine light comes on when driving sometimes.
Keep this thread posted ...be interested to hear what it may be or if thats the issue.Yes, new plugs gaped to .40, wires, and new coil pack. Checking for a possible vacuum leak somewhere.