Service bulletins for the 2020 Western Star 4900
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.
156 on file from NHTSA, as of 2026-10-19.
By type
By component
| 19TL-15 | 2019-09-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Tool Letter for ICC5 Programming Cable |
|---|---|
| WP19-014 | 2019-09-28. Service bulletin. EQUIPMENT. Warranty Policy Change for Delivery-Related Changes: Electronic Proof of Delivery and Loose Component Claim Filing |
| SF591 | 2019-09-28. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign for Wabco HP Air Dryer Turbo Cut-off Valve |
| SBW54-073 | 2019-09-28. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin for Powernet Distribution Box Functional Changes |
| SB47-015 | 2019-09-28. Service bulletin. FUEL SYSTEM, GASOLINE. Service Bulletin for Equiflo Fuel System Breather Tube Inspection |
| SB00-08 | 2019-09-28. Service bulletin. EQUIPMENT. Service Bulletin for Dealer Product Report |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.