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Service bulletins for the 2018 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.

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

By type

By component

Bulletins, newest first
0312-182018-06-11. Service bulletin. POWER TRAIN. 0312-18 Installation Output Shaft Seal
0311-182018-06-11. Service bulletin. POWER TRAIN. 0311-18 Installation of the Main Shaft Speed Sensor
aeo18M12018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. aeo18M1 GHG14 Heavy Duty Engine Platform Vocational Application Programming
MY18M12018-06-11. Service bulletin. ELECTRICAL SYSTEM. MY18M1a_05-MAR-2018_Vocational
17TL8Rev12018-06-11. Service bulletin. ELECTRICAL SYSTEM. Vehicle Interface Module
17TL7Rev2018-06-11. Service bulletin. ENGINE. Heavy Duty Engine Wastegate Repair Kit DKI470E16019
17TS112018-06-11. Service bulletin. POWER TRAIN. Detroit? DT12? Transmission Proper Moving Procedure
17TS102018-06-11. Service bulletin. SUSPENSION. Detroit? DT12? Split Rod Bushing Repair
0406-172018-06-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). SPN 521221 (TCM)
0405-172018-06-11. Service bulletin. ELECTRICAL SYSTEM. SPN 521222 (TCM)
0408-17 SPN 52422018-06-11. Service bulletin. ELECTRICAL SYSTEM. FMI 2- Automatic Gear Selection - Incompatible or missing dataset
0401-172018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. SPN 4765 FMI 0 - Exhaust Temperature Out Of Range High
0402-172018-06-11. Service bulletin. UNKNOWN OR OTHER. SPN 1322 (MCM) (GHG17)
0403-172018-06-11. Service bulletin. ELECTRICAL SYSTEM. SPN 677 FMI 2 Starter Switch Inconsistent Diagnostics
0411-172018-06-11. Service bulletin. EQUIPMENT. SPN 5741 (ACM) (GHG17)
0410-172018-06-11. Service bulletin. EQUIPMENT. Symptom Diagnostics - Hard Start No Start
0412-172018-06-11. Service bulletin. EQUIPMENT. SPN 3556 FMI 0, 1, 18 - Regeneration Temperature Update Procedures
0409-172018-06-11. Service bulletin. EQUIPMENT. SPN 1663 (CPC) (EPA07 10 GHG14 GHG17)
0407-172018-06-11. Service bulletin. ENGINE AND ENGINE COOLING. GHG17 Heavy Duty- Exhaust & EGR - EGR Actuator Coolant Lines
sbw490172018-06-11. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM. Magnetized Fill Neck for Six-Gallon DEF Tanks
0140-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 0140-17 Turbocharger Compressor Outlet Pipe
0139-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING. 0139-17 Coolant Housing
0138-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE). 0138-17 GHG17 DD5 Medium Duty - Exhaust and EGR - EGR Delivery
0137-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. 0137-17 SPN 3361 FMI 5 (ACM) (GHG17) SPN 3361 FMI 5 (ACM) (GHG14)
0136-172018-04-16. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE); ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 0136-17 GHG17 DD5 Medium Duty - Exhaust and EGR - Turbocharger Oil

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