I have a base model 06 grand prix. driving this morning the DIC read Service vehicle soon. Book says its a non emisions fault. It still runs and drives fine. Any ideas what it could be? What else do these cars monitor? No other alarms from the car but that.. I do notice that it cranks a little slower when starting and the DIC just reads the straight dashed line, direction and temp upon startup. Didnt read that before this... Thanks for any help.