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Service bulletin 42-010

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 id10140646
Published by NHTSA2018-06-11
Manufacturer's number42-010
Manufacturer's date2017-11-17
NHTSA componentEQUIPMENT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; PARKING BRAKE:CONVENTIONAL:AIR; SERVICE BRAKES, AIR

NHTSA's summary

Transport Dealer Air Leak Inspection

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

Brakes, Equipment and accessories, Labels and manuals, Parking brake

Vehicles listed
WESTERN STAR 47002015, 2016, 2017, 2018
WESTERN STAR 48002015, 2016, 2017
WESTERN STAR 49002015, 2016, 2017, 2018
WESTERN STAR 57002015, 2016, 2017, 2018
WESTERN STAR 59002015, 2016, 2017

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