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Service bulletin FSC-502-A

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 id10057451
Published by NHTSA2015-05-30
Manufacturer's numberFSC-502-A
Manufacturer's date2015-03-01
NHTSA componentELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP

NHTSA's summary

DAIMLER TRUCKS: MORE ROBUST RELAYS, THAT ARE LARGER, WILL BE INSTALLED TO INCREASE DESIRED LIFE IN CERTAIN FUEL PUMP AND/OR STARTER RELAYS. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Fuel system, Fuel pump, Starter

Vehicles listed
FCCC MT45G2014 to 2015
FCCC MT55G2014 to 2015
FREIGHTLINER MT45G2011 to 2014
FREIGHTLINER MT55G2011 to 2014

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