Been having lots of issues with error codes relating to the emission exhaust system. Numerous trips to dealer. Lucky for me it was covered under the extended warranty with settlement. Replaced the exhaust system also sensors. Month later same codes. Only thing left was replacing the DEF pump...
Got GDE tune in 2017. Loved it. But Recently Had to get all the recalls installed at dealer . Lost my tune, truck ran like crap. Just ordered the latest tune update using the OBD flash tool they provide, at a cost. Learning curve to install, need a non apple laptop to program the OBD tool...