Service bulletin PIT6450A
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.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11025584 |
| Published by NHTSA | 2025-11-18 |
| Manufacturer's number | PIT6450A |
| Manufacturer's date | 2025-11-14 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
This preliminary information communicates an issue with a Service Brake system message and DTC C0597 C055F. Dealers are to replace the brake master cylinder.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Trouble codes named
C055F, C0597
| CADILLAC ESCALADE | 2026 |
|---|---|
| CADILLAC ESCALADE ESV | 2026 |
| CHEVROLET SILVERADO 1500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SUBURBAN 1500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TAHOE | 2026 |
| GMC SIERRA 1500 | 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON | 2026 |
| GMC YUKON XL | 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.