Service bulletin PIT6477C
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 | 11033753 |
| Published by NHTSA | 2026-06-08 |
| Manufacturer's number | PIT6477C |
| Manufacturer's date | 2026-06-05 |
| NHTSA component | UNKNOWN OR OTHER |
NHTSA's summary
This preliminary PI was created to advise techniians in the field that they will not be able to perform a GDS automated bleed with the scan tool dues to a issue with the software in the scan tool
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.
| CADILLAC ESCALADE | 2021, 2022, 2023, 2024, 2025, 2026 |
|---|---|
| CADILLAC ESCALADE ESV | 2021, 2022, 2023, 2024, 2025, 2026 |
| CADILLAC ESCALADE IQ | 2025, 2026 |
| CADILLAC ESCALADE IQL | 2026 |
| CHEVROLET SILVERADO 1500 | 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SUBURBAN 1500 | 2021, 2022, 2023, 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET TAHOE | 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC HUMMER EV PICKUP | 2022, 2023, 2024, 2025, 2026 |
| GMC HUMMER EV SUV | 2024, 2025, 2026 |
| GMC SIERRA EV | 2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON | 2021, 2022, 2023, 2024, 2025, 2026 |
| GMC YUKON XL | 2021, 2022, 2023, 2024, 2025, 2026 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.