Service bulletins for the 2019 Cadillac XT4
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.
832 on file from NHTSA, as of 2026-10-19.
About P0451 on the 2019 Cadillac XT4: what the code means, and the bulletins and recalls about the same components.
By type
By component
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Only bulletins with trouble code: P0451 are shown. Show all
| 22-NA-203 | 2024-05-02. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 Set. |
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| 22-NA-203 | 2022-11-02. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. This technical bulletin provides a procedure to correct the condition of Check Engine Lamp Illuminated on Driver Information Center (DIC) with DTC P0451 Set. |
| PIE0537 | 2019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to a check engine lamp illuminated and DTC P0451 set. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.