Service bulletins for the 2021 Ram 5500
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
369 on file from NHTSA, as of 2026-10-19.
About B11CB on the 2021 Ram 5500: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: B11CB are shown. Show all
| S2124000003 | 2022-09-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A/C Performance Not As Hot/Cold On Driver Side - DTC's B11CB-92, B11CB-11 |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.