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Service bulletins for the 2015 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.

617 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
CXA 3_25_NOx2025-04-02. Other. ENGINE. CX Advocate for NOx conversion low faults
CXA 2_25_Turbo Oil Drain2025-03-04. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 2_25_NOx2025-03-04. Other. ENGINE. CX Advocate for NOx conversion low faults
CXA 1_16_Turbo Oil Drain2025-01-29. Other. ENGINE. CX Advocate for turbo oil drain cracking
CXA 1_16_GATS2.42025-01-29. Other. ENGINE. CX Advocate for GATS2.4 being expanding to DD15
CXA 1_16_DD13 Altitude2025-01-29. Other. ENGINE. CX Advocate for DD13 Gen 5 engines operating at high altitude experience EGR slow response fault.
ICI24-0512025-01-03. Other. ENGINE. Important Campaign Information letter for DDC D24R4 - Campaign Reactivated
ICI24-0502025-01-03. Other. ENGINE. Important Campaign Information letter for DDC D24R4 - Campaign Inactivated
D24R4-OWN LTR2024-12-04. Emissions. ENGINE. Detroit Emission recall for GHG14 DETROIT DD16 Software Reprogramming
D24R4-DLR LTR2024-12-04. Emissions. ENGINE. Detroit Emission recall for GHG14 DETROIT DD16 Software Reprogramming
D24R4-Bulletin2024-12-04. Emissions. ENGINE. Detroit Emission recall for GHG14 DETROIT DD16 Software Reprogramming
ICI24-0312024-09-07. Other. ENGINE. Important Campaign Information letter for DDC D23M3 - Campaign Reactivated and Extended. Field Service Campaign D23M3 - GHG17 DETROITTM DD16® Vibration Damper Replacement has been extended for an additional 6 months.
CXA 7_24_Oil Suction2024-08-02. Other. ENGINE. CX Advocate for Oil Suction manifolds
CXA 7_24_NOx2024-08-02. Other. ENGINE. CX Advocate for NOx conversion low faults. Update to CXA 6_24_NOx submission.
CXA 06_24_NOx2024-07-09. Other. ENGINE. CX Advocate communication for NOx conversion low faults
SBW49-0202022-03-03. Service bulletin. ENGINE AND ENGINE COOLING. Western Star Service Bulletin for DEF Connector Reinforcement Caps
D21R12021-05-04. Service bulletin. ENGINE AND ENGINE COOLING. Detroit Emission Recall for GHG14 DETROIT DD13 with Two-Box Aftertreatment Software Reprogramming. Certain Detroit Model Year 2013 to 2015 GHG14 DD13 engines that are registered in the state of California will require reprogramming to a minimum of the MCM and ACM software versions.
16TS-08REV2021-04-24. Service bulletin. ENGINE AND ENGINE COOLING. Detroit Technical Service Letter for DD13 Cylinder Head and Cylinder Head Gasket Change.
WI21-0092021-04-24. Service bulletin. ENGINE AND ENGINE COOLING. Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown. The updated after treatment system (ATS) diesel exhaust fluid (DEF) pump times will be applied to repair orders opened on or after April 12, 2021.
D21M22021-03-02. Service bulletin. ENGINE AND ENGINE COOLING. DDC Field Service Campaign for GHG14 DETROIT DD13 with One-Box Aftertreatment Software Reprogramming. Certain Detroit Model Year 2013 to 2015 GHG14 DD13 engines that are registered in California will require reprogramming to a minimum of the MCM software version and fuel map version listed below: MCM Software Version 4.7.0.0 ZGS 005.
21OEM-062021-03-01. Service bulletin. ENGINE AND ENGINE COOLING. Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available. Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops & OEM locations are required to maintain the latest version of software on each of their stations.
WI21-0062021-02-26. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines.
TechTalk80612021-02-03. Service bulletin. ENGINE AND ENGINE COOLING. Tech Talk discussion on GHG14 Regen acting unusual.
18SP7442020-12-08. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit.
20TS-092020-12-07. Service bulletin. ENGINE AND ENGINE COOLING. Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.

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