Jeep Grand Cherokee 2022–2023 — technical service bulletin
Bulletin 9100159 · NHTSA communication 10236803 · issued Apr 13, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2022–2023
model years
2
vehicle entries
Official summary
engine mount / heat shield Before replacing the engine mounts or engine heat shields for humming, droning, moaning, or grinding type noise, verify the noise is not coming from the transfer case or rear driveshaft center bearing. Follow the diagnostic procedure outlined in the latest version of Star Online Publication S2303000001 prior to any repair.
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.