now I have a service engine soon text on my DIC, there is no dash lights on though...it just says "Service Engine Soon" ... 15 miles prior to this little issue, I put a bottle of Lucas fuel injector cleaner in my tank and filled up my car...
The manual says the following, " This warning message displays when a non-emissions related malfunction occurs. Have the vehicle serviced by your GM dealer as soon as possible. "
the rest is bull and so is that warning message.