Service bulletins for the 2021 Chevrolet 5500XD
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.
283 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Heating and air conditioning are shown. Show all
| 12-01-37-001F | 2022-07-12. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.