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Service bulletin SD-13-21021

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 id10054117
Published by NHTSA2013-12-21
Manufacturer's numberSD-13-21021
Manufacturer's date2013-08-01
NHTSA componentSERVICE BRAKES, AIR:ANTILOCK; TRACTION CONTROL SYSTEM

NHTSA's summary

BENDIX: ON SOME SEMI TRACTORS, THE AUTOMATED AIR PRESSURE TRANSFER SYSTEM PROVIDE AN IMPROVED TRACTION AT LOW SPEEDS, WITH ADVANCED ANTILOCK BRAKE SYSTEMS (ABS), (PULLING AWAY ON INCLINED RAMPS, OR SLIPPERY CONDITIONS (MUD OR SNOW COVERED SURFACES). MODEL ETRAC AUTOMATED AIR PRESSURE TRANSFER SYSTEM. NO YEARS LISTED. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes, Driver assistance, Anti-lock brakes

Vehicles listed
BENDIX EC-30 ANTILOCK ECU
BENDIX SERVICE BRAKES AIR

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