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Service bulletin SF648

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10209300
Published by NHTSA2022-04-01
Manufacturer's numberSF648
Manufacturer's date2022-03-18
NHTSA componentSUSPENSION

NHTSA's summary

Field Service Campaign for Western Star 47X and 49X SBA Front Suspension Shackle Bolts. On certain vehicles, the front suspension shackle bar may have a deformed spring pin hole due to lack of clamp load at the spring pin joint, causing a decrease in joint clamp load and movement of the spring pin.

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

Suspension

Vehicles listed
WESTERN STAR 49X2021 to 2022

Listing a model year does not mean every vehicle of it is concerned: the document says which.