Jeep Grand Cherokee 2019 — technical service bulletin
Bulletin 21-047-19 · NHTSA communication 10170414 · issued Dec 21, 2019
Technical service bulletin
communication type
Electrical System
component
2019
model years
1
vehicle entries
Official summary
Flash: Transmission Control Module (TCM) Updates This bulletin involves reprogramming the TCM with the latest available software. The customer may describe the following: A harsh shift on coast down 3-2 or 2-1.
Vehicles covered
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.