Service bulletin 18309
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 | 10150559 |
| Published by NHTSA | 2018-12-10 |
| Manufacturer's number | 18309 |
| Manufacturer's date | 2018-10-01 |
| NHTSA component | WHEELS; ENGINE; SUSPENSION; POWER TRAIN:AUTOMATIC TRANSMISSION |
NHTSA's summary
18309 - Customer Satisfaction Program. Certain 2019 model year Chevrolet Silverado and GMC Sierra vehicles may have a condition where the prop shaft bolts may not have been properly torqued to the front differential. Drivers will likely experience a vibration or clunking noise as the bolt(s) loosen when the vehicle is used in 4WD mode. If the vehicle continues to be driven after the vibration or clunking noise occurs, all bolts may eventually fracture. Remove front prop shaft bolts, add Loctite, and reinstall.
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
Engine, Suspension, Transmission and driveline, Wheels, Automatic transmission
| CHEVROLET SILVERADO 1500 | 2019 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| GMC SIERRA 1500 | 2019 (the catalog's model; the bulletin names a series or trim of it) |
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