RAM 2500 2021 — technical service bulletin
Bulletin 0807621REVA · NHTSA communication 10223354 · issued May 19, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
4
vehicle entries
Official summary
Flash: Amplifier (AMP) Diagnostic and System Updates This bulletin involves reprogramming the AMP with the latest available software. The following software enhancement is available:Amplifier update to eliminate static noise from the instrument panel mounted speakers.
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.