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Service bulletins for the 2014 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.

341 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
0601-172019-04-01. Service bulletin. EQUIPMENT; ENGINE. SPN 3464 (MCM) (GHG14)
0602-172019-04-01. Service bulletin. ENGINE. Cylinder Liner - Testing of the Cylinder Liner Upper O-Ring
0606-172019-03-25. Service bulletin. EQUIPMENT; ENGINE. SPN 3226 (ACM) (GHG17)
0609-172019-03-25. Service bulletin. EQUIPMENT; ENGINE. SPN 3226 (ACM) (GHG17)
0602-172019-03-25. Service bulletin. ENGINE. Cylinder Liner - Testing of the Cylinder Liner Upper O-Ring
17-0232019-02-19. Service bulletin. ENGINE. New Detroit Diesel Cylinder Liner Upper O-Ring Leak Test Standard Repair Time
0902-172019-02-19. Service bulletin. ENGINE. SPN 3556 (ACM) (GHG14)
0903-172019-02-19. Service bulletin. ENGINE. Engine Manufacturer Diagnostics
Aftertreamtent F2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; EQUIPMENT. Service Information Bulletin for Aftertreamtent Failure Guide
aeo18M32018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. Field Service Campaign D18M3 Oil_Suction_Manifold_072718, Owner Notice
owner18R32018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. owner18R3 Emission Recall D18R3
GHG14 18R32018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; EQUIPMENT. GHG14_18R3_bulletin_07-MAY-2018a Emission Recall D18R3
0505-182018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low
0503-182018-12-10. Service bulletin. EQUIPMENT; ENGINE. 0503-18 Relative Cylinder Compression Test
0502-182018-12-10. Service bulletin. ENGINE AND ENGINE COOLING. 0502-18 Symptom Diagnostics - Low Engine Coolant Temperature
18SP7342018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER. 18SP734 18SP734?GHG14 DD15AT Turbocharger
D18M1 GHG14 Heav2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ELECTRICAL SYSTEM:SOFTWARE. Field Service Campaign: GHG14 Heavy Duty Engine Platform Vocational Application Programming
D18M3 Heavy Duty2018-12-10. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. Field Service Campaign - Heavy Duty Engine Platform Oil Suction Manifold
owner18R32018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. owner18R3 Emission Recall D18R3
GHG14-18R32018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ENGINE AND ENGINE COOLING:ENGINE:DIESEL. GHG14-18R3 bulletin-07-MAY-2018a-Emission Recall D18R3
0505-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. 0505-18 SPN 3563 HDEP Inlet manifold pressure Too Low
0503-182018-10-29. Service bulletin. ENGINE; EQUIPMENT. 0503-18 Relative Cylinder Compression Test
0502-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING. 0502-18 Symptom Diagnostics - Low Engine Coolant Temperature
18SP7342018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. 18SP734 18SP734?GHG14 DD15AT Turbocharger
0312-182018-10-29. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; EQUIPMENT. 0312-18 Installation Output Shaft Seal

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