Service bulletins for the 2025 Cadillac CT5
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.
345 on file from NHTSA, as of 2026-10-19.
About P0300 on the 2025 Cadillac CT5: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: P0300 are shown. Show all
| 18-NA-115 | 2024-08-14. Service bulletin. ENGINE. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.