WenmarOpen by Wenmar Pro

Service bulletin 14-026

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 id10177939
Published by NHTSA2020-08-05
Manufacturer's number14-026
Manufacturer's date2020-07-10
NHTSA componentSTRUCTURE

NHTSA's summary

Fix as Fail: Peterbilt has designed an improved Secondary Chassis Module (SCM) bracket which is available for Models 567/579 built between January 01, 2018 and February 20, 2020. SCM brackets impacted by torsional stress may separate from the back of cab crossmember.

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

Vehicles listed
PETERBILT 5672019

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

Other bulletins for the same vehicles and component
02-2012026-05-20. Service bulletin. This recently published bulletin has been updated to include inspection procedures to assess if a hood is repairable.
02-2012026-05-06. Service bulletin. Model 567 Hood Strut Support Structure -A new procedure is now available to install hood structure reinforcements on Model 567 and 567 BEV chassis, improving performance and durability.
32-0192023-03-01. Service bulletin. Fix As Fail – Chassis that were manufactured with certain battery cable routing brackets may experience rubbing or chafing of the battery cables.
02-1582020-09-03. Service bulletin. Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to add the reinforcement bracket(s) to affected vehicles.
43-0672020-07-03. Service bulletin. Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and built from 03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.
43-0662020-04-07. Service bulletin. DEF tank covers may become loose and potentially crack on vehicles built before October 2019 with DEF tank part number M86-6221-003**(TANK-DEF MEDIUM ASSY) and M86-6222-003**(TANK-DEF LARGE, ASSY). Resolution is to resolve the vibration on the tank cover by adding bottom tank washers.
45-0602019-09-05. Service bulletin. Non-Safety Campaign Vehicles were built with a ladder bracket to aide in the routing of engine harnesses could potentially cause damage to the engine harness and must be removed.