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Service bulletin SLM21-009

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 id10201722
Published by NHTSA2021-10-01
Manufacturer's numberSLM21-009
Manufacturer's date2021-09-30
NHTSA componentSTRUCTURE; POWER TRAIN; ELECTRICAL SYSTEM; SERVICE BRAKES; ENGINE

NHTSA's summary

Service Literature Published and Released in September, 2021

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

Body and frame, Brakes, Electrical system, Engine, Transmission and driveline

Vehicles listed
MACK MACK

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