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Service bulletin SB-12-TS-21

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 id10050039
Published by NHTSA2013-01-24
Manufacturer's numberSB-12-TS-21
Manufacturer's date2012-12-11
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

DETROIT: DUE TO INSTALLATION OF INJECTOR CUP SEALS THAT CAUSES CROSS CONTAMINATION WITH FUEL, OR COOLANT LEAKAGE OR ENGINE FAILURE, IN DD ENGINES, WILL BE REPLACED. MODELS DD13, DD15. *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

Engine, Cooling system

Vehicles listed
DETROIT DIESEL DD13
DETROIT DIESEL DD15

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