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Service bulletin 20TS-09

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10183733
Published by NHTSA2020-12-07
Manufacturer's number20TS-09
Manufacturer's date2020-12-06
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FREIGHTLINER 122SD2014 to 2021
FREIGHTLINER CASCADIA2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
FREIGHTLINER CENTURY2009 to 2010
FREIGHTLINER COLUMBIA2009, 2010, 2011
FREIGHTLINER CORONADO2010, 2011, 2012, 2013
STERLING 95002008 to 2010
STERLING LT95002008
WESTERN STAR 49002009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 49X2021
WESTERN STAR 57002015, 2016, 2017, 2018, 2019, 2020, 2021
WESTERN STAR 69002011, 2012
WESTERN STAR 69002015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V0730002021-02-12. ENGINE
18V5810002018-08-30. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
16V4160002016-06-09. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
20162852016-06-06. Engine
15V8160002015-12-07. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
20154842015-10-16. Engine
15V6200002015-10-02. ELECTRICAL SYSTEM:IGNITION:MODULE; ENGINE AND ENGINE COOLING:ENGINE
14V6800002014-10-29. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
14V0800002014-02-21. ENGINE AND ENGINE COOLING:ENGINE
12V0740002012-02-28. ENGINE AND ENGINE COOLING:ENGINE:DIESEL

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
CXA 03_26_Surge Tank2026-04-02. Other. CX Advocate for discolored coolant surge tanks (24CSA-20)
FleetCom_Heater Core2026-01-08. Other. Fleet Communications for Heater Core Plugging
FleetCom_SS 3163-FTL2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting
FleetCom_Low Coolant2025-12-05. Other. Fleet Communications for Low Coolant Sensor
CXA_10_25_Low Coolant2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
CXA_10_25_Conmet Oil Pan2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues
CXA_9_25_Tech Questions2025-10-03. Other. CX Advocate for technical questions/issues raised
CXA_8_25_Tech Questions2025-09-02. Other. CX Advocate for technical questions/issues raised
24CSA-19Rev2025-09-02. Other. Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
CXA 3_25_NOx2025-04-02. Other. CX Advocate for NOx conversion low faults