RAM 1500 2019–2021 — technical service bulletin
Bulletin 23-028-21 · NHTSA communication 10218587 · issued Aug 25, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2021
model years
3
vehicle entries
Official summary
Water Leak At CHMSL This bulletin involves replacing the Center High Mounted Stop Lamp (CHMSL) assembly. The customer may experience on one or more of the following:Water on the headliner. Water at the back of the cab. A leak from the third brake light/CHMSL.
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.