Service bulletins for the 2020 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.
758 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Brake master cylinder are shown. Show all
| 20NA086 | 2020-05-26. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER. This informational bulletin provides information about a GDS2 error message being on due to connector being swapped during reassembly. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.