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Service bulletin D19M2 GHG17

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 id10158009
Published by NHTSA2019-04-08
Manufacturer's numberD19M2 GHG17
Manufacturer's date2019-02-28
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

Field Service Campaign D19M2 GHG17 Detroit? DD5? Fan Hub Bolt Torque Inspection

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, Equipment and accessories, Cooling system, Radiator

Vehicles listed
FREIGHTLINER M22017
FREIGHTLINER M2 BUSINESS CLASS2018 to 2019

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

Other bulletins for the same vehicles and component
20-732018-02-12. Service bulletin. 20-73 - CANCELED: Cascadia Radiator Update?EPA10 with DDC Engines