Jeep Grand Cherokee 2021 — technical service bulletin
Bulletin S2108000139 · NHTSA communication 10221257 · issued Jun 5, 2021
Technical service bulletin
communication type
Equipment
component
2021
model years
1
vehicle entries
Official summary
Cluster Displays Traffic Sign Assist Unavailable Service Required When Initially Starting Vehicle. U0149 ? Loss Of Com With SGW Is Stored In The DASM
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.