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Service bulletins for the 2020 Western Star 5700

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.

159 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
WI19-0222020-01-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM. Warranty Information Letter announcing Detroit NOx Sensor Circuit Improvements for GHG17 After Treatment Systems
19TS-4REV2019-10-28. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter Revision on heavy duty coolant oil module and oil filter change. Older modules will not be compatible with newer module.
19TL-182019-10-26. Service bulletin. ENGINE AND ENGINE COOLING. Tool Letter for updating Cascadia and Western Star 5700 oil-to-air coolers. To be used with service bulletins SB26-051 and SB26004 respectively.
19CSA-162019-10-26. Service bulletin. ENGINE AND ENGINE COOLING. Customer Service Announcement that eParts is being retired and that PartsPro should be used instead for Detroit Engine Parts Information.
17TS92019-10-25. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter communicating that information on DD Heavy Duty Platform Belt and Belt Tensioner can be found on TechLit.
DOC-10345002019-10-03. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Service Solution to fix AC cooling performance due to improper HVAC function.
19TL-152019-09-28. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. Tool Letter for ICC5 Programming Cable
SF5912019-09-28. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign for Wabco HP Air Dryer Turbo Cut-off Valve

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.