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Service bulletins for the 2019 Western Star 6900

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.

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

By type

By component

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
SBW72-0082019-12-20. Service bulletin. STRUCTURE; VISIBILITY. Service Bulletin for Window Regulator Retrofit.
SS10345772019-12-03. Service bulletin. EQUIPMENT; POWER TRAIN; STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY. Service Solution to address WST Cab drone / vibration / tapping Under acceleration for vehicles w/Eaton Manual Trans.
SS10345792019-12-03. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Service Solution for prematurely failing coolers on WST Models equipped with Allison Transmissions and Rocore Transmission coolers (07-23256-001) with tow pin front X-member. Part number 07-25266-000 is a direct replacement of the failing coolers and requires no modifications or plumbing changes.
SBW00-0042019-11-24. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Service Bulletin explaining Western Star's courtesy engineering policy.
SS10344992019-10-30. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Service Solution on failing RX modules in Western Star vehicles.
CAL_WS_420012019-10-30. Service bulletin. SERVICE BRAKES, AIR; EQUIPMENT. Customer Advisory Letter for WABCO HP air dryer turbo cut-off valve replacement.
SS10345312019-10-30. Service bulletin. SERVICE BRAKES, AIR; EQUIPMENT. Service Solution for WABCO HP air dryer turbo cut-off valve replacement.
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.
P&SSep20192019-10-08. Service bulletin. EQUIPMENT. Parts and Service Committee meeting minutes
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
WP19-0142019-09-28. Service bulletin. EQUIPMENT. Warranty Policy Change for Delivery-Related Changes: Electronic Proof of Delivery and Loose Component Claim Filing
SF5912019-09-28. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign for Wabco HP Air Dryer Turbo Cut-off Valve
SBW54-0732019-09-28. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin for Powernet Distribution Box Functional Changes
SB47-0152019-09-28. Service bulletin. FUEL SYSTEM, GASOLINE. Service Bulletin for Equiflo Fuel System Breather Tube Inspection
15CSA-3REV2019-09-10. Service bulletin. EQUIPMENT. Customer Service Announcement Letter Revision for Dealers/Distributors Accessing DDEC Backdoor Passwords
19TL-10 NVH2019-09-09. Service bulletin. STRUCTURE. Communication to assist the field with service vibration issues on DTNA vehicles
19CSA-12 BCT2019-09-09. Service bulletin. ELECTRICAL SYSTEM. PowerNet Assessment Tool Repair Procedure
19CSA-132019-09-09. Service bulletin. ENGINE AND ENGINE COOLING. Service Systems Development provided document to service locations on price list reflects current charges to engine horsepower ratings for HDEP and MDEG engine platforms.
19TS-GHG17 DD132019-09-06. Service bulletin. ENGINE AND ENGINE COOLING. Document sent out by Service Systems Development to fix issue related to DD13 engines built between June 5 and July 22, 2019 starting with ESN 471928S0697276,have some incorrect values set which can cause the fan to lock on at all times.
19-011WP2019-09-06. Service bulletin. EQUIPMENT. Warranty Policy Letter to communicate Detroit Return Changes
19-012WP2019-09-05. Service bulletin. EQUIPMENT. Warranty Policy Letter to communicate remarketing handling cap for Detroit DT12 Transmission.
19-013WI2019-09-05. Service bulletin. EQUIPMENT. Warranty Information Letter to announce addition of Thomas Built Bus as a brand with an Authorized Demonstrator Program
19-010WI2019-09-04. Service bulletin. EQUIPMENT. Warranty Information Letter updated to communicate warranty system updates.

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