Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
This message is indicating that the emissions redux system is about to go into a power reduction mode to burn the soot and carbon out of the particulate filters in the exhaust system. These systems have been a little finicky on the newer duramax trucks. How many miles do you have on your truck? How much DEF do you have in your DEF tank?