Service bulletin 20NA078
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 | 10184484 |
| Published by NHTSA | 2020-12-21 |
| Manufacturer's number | 20NA078 |
| Manufacturer's date | 2020-11-23 |
| NHTSA component | EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:CLUTCH ASSEMBLY; EQUIPMENT |
NHTSA's summary
This technical bulletin provides a procedure to replace the 4 5 6 clutch housing if the bushing was found worn and the cause of the customers concern.
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.
Components
Equipment and accessories, Transmission and driveline, Clutch
| CHEVROLET EXPRESS | 2019, 2020, 2021 |
|---|---|
| CHEVROLET SILVERADO 1500 | 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 2500 | 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SILVERADO 4500 | 2019, 2020 (the catalog's model; the bulletin names a series or trim of it) |
| CHEVROLET SUBURBAN | 2019, 2020, 2021 |
| CHEVROLET TAHOE | 2019, 2020, 2021 |
| GMC SAVANA | 2020 |
| GMC SIERRA 1500 | 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA 2500 | 2020, 2021 (the catalog's model; the bulletin names a series or trim of it) |
| GMC SIERRA DENALI | 2019 (the catalog's model; the bulletin names a series or trim of it) |
| GMC YUKON | 2019, 2020, 2021 |
| GMC YUKON XL | 2019, 2020, 2021 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 20NA078 | 2020-04-27. Service bulletin. This technical bulletin provides a procedure to replace the 4 5 6 clutch housing if the bushing was found worn and the cause of the customers concern. |
|---|