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Service bulletin 20-013 TSB

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 id10176199
Published by NHTSA2020-06-08
Manufacturer's number20-013 TSB
Manufacturer's date2020-06-08
NHTSA componentSERVICE BRAKES

NHTSA's summary

Certain Dexter Axles equipped with electric over hydraulic (E/H) brake actuators may not be compatible with GM integrated Trailer Brake Controller on newer model GMC Vehicles. When the driver applies the brake for the first time to move the transmission out of park, there will be an in-dash fault code notification. When seeing this notification the driver should not tow the vehicle. The integrated trailer brake controller will disable the trailer brakes after the third (3rd) engagement. Dexter Service Bulletin #010

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

Brakes

Vehicles listed
JAYCO FIFTH WHEEL SEISMIC2020

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