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Service bulletin KC-527

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 id10186431
Published by NHTSA2021-02-01
Manufacturer's numberKC-527
Manufacturer's date2021-01-21
NHTSA componentFUEL SYSTEM, GASOLINE

NHTSA's summary

Diesel Exhaust Fluid ( DEF ) Contamination In Fuel System, Inspection And Repair; Engine Misfire, No-Start, Uneven Operation, Multiple Injector Codes, Fuel Pressure Codes - US17 And Newer ( Common Rail Fuel System )

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

Fuel system

Vehicles listed
MACK MACK

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