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Service bulletin CALM2CHM

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 id10174993
Published by NHTSA2020-05-15
Manufacturer's numberCALM2CHM
Manufacturer's date2020-05-15
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Customer Advisory Letter for inspection of the M2 chassis module. Inspecting for heat damage on Pin J and Pin S.

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

Electrical system

Vehicles listed
FREIGHTLINER BUSINESS CLASS M22014 to 2016

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