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Service bulletin KC-759

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 id10215285
Published by NHTSA2022-07-05
Manufacturer's numberKC-759
Manufacturer's date2022-06-29
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

New Trim Codes May Need To Be Reprogrammed Following Engine Replacement With 7/8 Reman Or Complete (Engine With Both New Injectors And Engine Control Module); Possible Uneven Operation/Rough Running At Idle Following EMS Programming With Data Transfer.

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
MACK MACK
MACK MACK1955 to 1999
MACK MACK2001

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