Jeep Grand Cherokee 2022 — technical service bulletin
Bulletin 08-312-25 · NHTSA communication 11023584 · issued Sep 23, 2025
Technical service bulletin
communication type
Electrical System
component
2022
model years
2
vehicle entries
Official summary
Flash: Amplifier (AMP) Diagnostic and System Updates Customers may experience one or more of the following: ● **Droning noises coming out of the speakers at specific RPMs that range from 1200 to 1800 RPM. Probability of occurence is most likely during cold ambient temperatures.** ● High pitched noise at start up or idle under cold conditions. This bulletin involves updating the AMP with the latest available software.
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.