RAM 2500 2020 — technical service bulletin
Bulletin 1801221 · NHTSA communication 10212520 · issued Jun 26, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020
model years
2
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates OVERVIEW:
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.