Jeep Grand Cherokee 2014–2016 — technical service bulletin
Bulletin D-19-15 · NHTSA communication 10162510 · issued May 1, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2016
model years
3
vehicle entries
Official summary
(X78) Emission Control System ? 3.0L Diesel - 2014/2015/2016 Ram 1500 (DS) and 2014/2015/2016 Jeep Grand Cherokee (WK)
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.