2020 International HV TSBs
189 Technical Service Bulletins across 15 categories
Categories
Engine
67 bulletinsThis article only applies to Models w/ 0016UZL Built Between 06/23/2014 05/11/2020 OR Models w/ 0016UZL w/ Safety...
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Recall 14516 Completed Reference the appropriate Technician Manual for models outside of this population. Safety Recall 14516 has been issued for units built before June 23, 2014. For LT and 2018+ LoneStar: If there is a complaint of the bunk blower turning off after an auto start event, the BCM needs to be updated to Data Version 323 or higher. The bunk blower turning off was only present in BCM Data Version 309 to Data Version 322 To properly diagnose the system, you must ensure the recall has been performed. Only the "Cold Loop" sealed refrigerant core PN # 2614669C1 is to be replaced when the refrigerant circuit fails. DO NOT REPLACE THE COMPLETE UNIT IF THE A/C IS NOT FUNCTIONING. Complete unit is not Warrantable Refer to the BASIC TROUBLESHOOTING below before replacing any components. This will help you identify which component is at fault or any electrical issues. Refer to PARTS INFORMATION to properly identify the parts that may require replacement The A/C portion of the system is listed below in the parts section. The 16UZL No-Idle HVAC system is designed to disengage when the engine is started, and can be turned on with the key in any position. This battery-powered no-idle HVAC system provides heating and cooling of the sleeper area without use of the vehicle engine. The system is comprised of the no-idle HVAC components located in the sleeper HVAC module, a separate fuel-operated coolant heater mounted under the sleeper, and four additional batteries housed in a second battery box. The no-idle HVAC system shares the air handling assembly and several major components with the truck's standard HVAC system. Most importantly, the shared evaporator core contains refrigerant circuits for both the no idle system and the truck's standard A/C system. With this configuration, some procedures required to service the no idle A/C system will require opening the refrigerant circuit of the truck's standard A/C system. Trucks equipped with the 16UZL No-Idle HVAC system have two separate HVAC systems (Standard Truck A/C and the MaxxPower unit); it is important to identify each clearly, so you are troubleshooting the correct system. Per the Operator's Manual page 10: Run the heater at least once a month during the year (for a minimum of 15 minutes).
This document will guide the user through the changes of the dielectric grease/coatings used in certain areas on all...
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International vehicles built after 1/8/2018. International's Electrical Engineering Team made this change to improve the longevity of the OEM coatings and to improve applications at the factory.
This document provides guidance for assessing the feasibility of implementing a customer-requested change to an engine or vehicle parameter/feature.
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Customer requested changes will be approved in accordance with the requirements specified in 40 CFR Part 1037 to ensure continued compliance with greenhouse gas (GHG) regulations.
New CARB Idle Reduction Change Request
Engine replacements for all International engines will need to follow this procedure.
In some geographic areas, ambient temperatures reaching below 15F (-10 C), including high levels of humidity, an...
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operator may experience engine stalling, low performance, and or poor aftertreatment performance. This is caused by condensation accumulating and freezing within the Charge Air Cooler (CAC); affecting air flow into the engine. This article lists all the currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
Title: Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure Applies...
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To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or Clean Idle Sticker, Clean Truck Check
Title: Replacing the Crankshaft Gear on S13 Engines
Title: Supplemental A26 MAF Fault Diagnostics Applies To: All A26 Engines
Title: How to Request a Horsepower Quote Applies To: All International and Cummins Electronic engines
Applies To: All Navistar Powered Trucks Requesting Engine Emission Label Replacement, Certificate of Conformance and/or...
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Clean Idle Sticker, Clean Truck Check
This document provides instructions for the programming changes that will be needed when performing an S13 engine swap.
The purpose of this document is to guide a user to resolve fault code 285 & 286 for Cummins engines.
Certain International vehicles built with A26 engines does meet the emission requirements for J1939-Stationary Test
Starter Diagnostics and warranty claim procedure; all engines EXCLUDING Cummins ISB engine with Allison transmission or...
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PSI engine.
Rebuilding Cylinder Heads on Certain MaxxForce 11/13, N13, and A26 engines; 2010 to present.
A26 and S13 Fuel Gelling; only vehicles equipped with International A26 or S13 engines
How to request a horsepower quote; all International and Cummins engines
Starter kicks out after 1 second on MV and HV with Cummins L9 Engines
Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
This Emissions Recall applies to truck models for which, per agreement with EPA and CARB, Navistar, Inc.
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provided an emergency calibration for International A26 engines when a DEF Quality Sensor (DQS) was not available. This action addressed the Diesel Exhaust Fluid (DEF) Quality Sensor failures in the field and the unavailability of parts due to the worldwide chip shortage. This recall is step two of this program designed to revert all affected vehicles back to the certified calibration and to provide them with the latest improved DQS and Coolant Control Valve (CCV) designs. Additionally, the emergency calibration and the restoration to the certified calibration with the latest improved DQS and Coolant Control Valve (CCV) designs have no effect on vehicle Emissions.
Cummins B6.7 and L9 engines with codes 285 and 286
New air compressor incorporates an oil feed dowel O-ring.
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Only models equipped with 2010 and newer MaxxForce 11/13 engines, all N13, and A26 engines
Per agreement with EPA and CARB, Cummins, Inc.
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provided an emergency calibration for Cummins ISB, B6.7, ISL9, L9, and X15 engines when a DEF Quality Sensor (DQS) was not available. This action addressed the Diesel Exhaust Fluid (DEF) Quality Sensor failures in the field and the unavailability of parts due to the worldwide chip shortage. This recall is step two of this program designed to revert all affected vehicles back to the certified calibration and to provide them with the latest improved DQS and Coolant Control Valve (CCV) designs. Additionally, the emergency calibration and the restoration to the certified calibration with the latest improved DQS and Coolant Control Valve (CCV) designs have no effect on vehicle Emissions.
New Air compressor Incorporates an oil feed dowel O-ring; only models built with MaxxForce 11/13, N13, or A26 Engines
Rebuilding cylinder heads on certain EPA 2010 MaxxForce 11/13, N13, and A26 Engines
Cummins Programming guide and fault codes285 & 265; only vehicles built with Cummins B6.7, X15, or L9 engines
Starter diagnostics and warranty claim procedure for all engines and all chassis EXCLUDING vehicles equipped with PSI...
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engines or Cummins ISB engine with Allison transmissions
Rebuilding Cylinder Heads on Certain International MaxxForce 11/13 engines and all International N13 and A26 engines
Service Diagnostic Software (SDS) Template to enable Recall 22518 connecting rod knock detection software.
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Only vehicles with International A26 Engine
QLS Emergency ECM Calibration; only models equipped with Cummins B6.7, X15, L9, or International A26 engines
Recall 22518 SDS Template to enable Con-rod knock detection
A26 connecting rod replacement process; only models with A26 engines built before November 2019.
QLS Emergency Calibration.
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applies to 2016 and newer Cummins B6.6, X15, and L9 engines and all A26 engines
The connecting rod bushing over time may develop cracks or lose chunks of material, which could lead to connecting rod failure.
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Only models with A26 engine.
The Body Control Module (BCM) may have outdated software that could result in active Over The Air (OTA) programming to...
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not fully complete and result in an inoperative Engine Control Module (ECM). Only models with International A26 engine and feature code 10ADT, 10AEK, 10AEU, 10AEY, 10AEZ, 10AGB, or 10AGC (Telematics Communications Module).
Under certain conditions, the Engine Control Module (ECM) programming may not detect when the Exhaust Gas Recirculation...
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(EGR) flow exceeds the predetermined threshold resulting in not setting a fault code and activating the Malfunction Indicator Light (MIL). Only models equipped with International A26 engine.
International A26 engine fuel delivery pressure sensor and harness pigtail eliminated
Certain HV series trucks may have a fuse panel graphic with no fuse rating for Heated Drain Valves (HDV) when vehicles...
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are equiped with more than one HDV.
Installing P/N 7104373C91 A26 Engine Sensor Harness
High Pressure Fuel Pump external leaks from weep hole.
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only trucks with 2010 MaxxForce 11/13L, all N13, or A26 engines
QLS Emergency Calibration; Models equipped with 2016 and newer Cummins B6.7, X15 and L9 engines or International A26...
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engine.
QLS Emergency Calibration; Models with 2016 Cummins ISX, A26 and EPA 2017 and newer Cummins X15, L9, or B6.7 engines
The Environmental Protection Agency (EPA) and California Air Resources Board (CARB) have approved an emergency...
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calibration to provide temporary relief from the global supply shortage of electrical components. When there is a communication fault in the DEF head unit / Quality Level Sensor (QLS) this temporary calibration will allow the vehicle to operate. The procedure in this document will include diagnosing the DEF head unit / QLS and if found to be defective will advise to install the temporary engine calibration if replacement parts are not available. Any vehicle that receives this calibration will be required to have it removed and a new QLS installed once parts become available, this will be managed through future communication.
Oil leaks at the Bottom of the Oil Filter Module; Only International A26, N13, or 2010 and newer 11 and 13 engines
Engine Oil Capacities.
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All International electronic engines 1994 to present and Cummins ISB, ISM, or ISX engines
QLS Emergency Calibration.
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Only models with EPA 2017 and newer Cummins X15, L9, or B6.7 engines
Snap-On torque wrench requirement for all big bore engine connecting rod bolt(s).
A26 Fuel Delivery Pressure Sensor (FDP) and Harness Pigtail Eliminated; only trucks equipped with International A26...
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engine
CPA BEAM RCT and Idle Test for A26 engine; only trucks equipped with International A26 engine
A26, N13, and 2010 EPA MaxxForce 11 and 13 engine Auxiliary Programable Parameters
On certain trucks equipped with an automatic transmission, if the automatic transmission is still in drive or reverse...
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position and the stationary PTO switch is engaged, the engine RPM will ramp up and may overcome parking brake hold capability resulting in possible vehicle movement.
1 channel CPA RCT test for A26 or CV 6.6L; Only trucks built with International A26 or 6.6 engines
7095496C3 EGR Bellows Heat Shield ID; only models equipped with A26 Engine
Fuel Filters, Winter Additives, and Blending Fuels for Cummins Engines
This document will guide the user through the proper use of the A26 Misfire Detection Session to determine cylinder...
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misfire count releted to the specific misfire DTCs.
A26 Engine fault code SPN: 4364 FMI: 18 Supplemental Diagnostics; Only models built with A26 engine
Reduced ISB Engine Exhaust Brake Efficiency; Only vehicles with Allison 1000/2000 series transmissions
A26 (engine) SPN: 4364 FMI: 18 Supplemental Diagnostics
A26 (engine) Fuel Gelling; Only models equipped with International A26 engine
The drive axle brake modulator valves may not meet the requirements for FMVSS 121 S5.3.4 Brake release time.
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Each service brake system shall meet the requirements of S5.3.4.1 (a) and (b).
On certain trucks equipped with an automatic transmission, if the automatic transmission is still in drive or reverse...
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position and the stationary PTO switch is engaged, the engine rpm could ramp up and may overcome parking brake hold capability resulting in possible vehicle movement.
Auxiliary Engine Speed Control Cannot Hold Engine Speed When Using Steering Wheel Switches
Identifying the Source of Oil Seen at the Lower Flywheel Housing Area.
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Only models equipped with Allison Transmission and International A26 or Cummins L9 engines
Oil Capacities; All Electronic International Engines 1994 - Present.
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Cummins ISB, ISM & ISX
Voltage gauge drops on cold engine start-up; Only models built with Cummins ISB, B6.7, ISL, or L9 engines
Engine Emission Label Replacement, Certificate of Conformance and Clean Idle Sticker Addition Procedure
Other
40 bulletinsThe purpose of this article is to describe all aspects of the A26 Connecting Rod Replacement Repair Processes.
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To address an A26 connecting rod supplier quality spill, Navistar is streamlining quality repair strategies to help avoid customer disturbance. Navistar is implementing connecting rod replacements which results in less downtime and damage avoidance.
This document will guide the user through understanding Prop Shaft Codes and understanding the variations of prop codes.
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(Metric Prop codes start with the number a 4 and Non metric Prop codes start with a 2.)
Title: Driveline Information Center and Troubleshooting Procedures Applies To: All Vehicles
Title: Fan belt replacement guidelines for frayed edges Applies To: All Models
Switch Pack Programming Troubleshooting Information
Title: Connecting an Auxiliary APU to the S13 Coolant System
Title: Supplemental A26 MAF Fault Diagnostics
This document will provide the user with cleaning options and procedures for aluminum bright work parts that become...
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stained or tarnished.
This document will guide the user to inspect oil pan for any sign of damage that could potentially be created by the...
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front axle set screw
Cummins ISB Starting system diagnostics.
J1939 Data Link Source Address Information
HV Enhanced transfer case cooling up-fit
Diagnosis of chassis wander complaints.
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
Certain HV 4X4 series trucks built with two-piece driveline may experience vibration when driving at highway speed.
Telematics installation guidelines - Only units with 500K data link
J1939 Data link source address information
Pico Scope CCOS (Crankcase Separator Test)
PicoScope Test One Channel RCT
PicoScope Test Resistance and Ohmmeter
PicoScope Test for Datalink (CAN) Health Shorts & opens
J1939 Data Link Source Address Information
Driveline vibration and reduced driveline performance may occur due to incorrect rear axle pinion angles.
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Only models built with 6X6 configuration.
J1939 Data Link Troubleshooting
How to obtain As built parameter list
Bendix Stability control - customer satisfaction performance improvement; Specific Emergency / Tanker applications only.
Tridem Axle Oil Temperature Cluster Messages
Cab Lean Concern
Driveline Information Center and Troubleshooting Procedures
Dielectric Grease Change
Cleaning and Disinfecting Trucks and Buses
J1939 Data Link Troubleshooting
LT RH HV MV Wire Terminal Information
Cummins ISB Fan Drive Belt Chirp; Cummins ISB and Cummins B6.7
A deformation in the center post of the switch pack housing may cause one or more of the switches to become loose and /...
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or pop out when depressed.
J1939 Data Link Source Address Information
SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
Only models built with Cummins X15; Fault Code 7125
Driveline Information Center and Troubleshooting Procedures
Electrical
23 bulletinsCertain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
Certain International trucks and IC BusTM CE Series buses may have out of date BCM programing that may cause erroneous...
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fault codes after a vehicle sits for 2 or 3 days.
This document is to inform dealers, customers, and body builders/TEMs of a known BCM software issue with kernels 747 through 752.
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Units built after November of 2024 as well as older units that were updated with DLB between 11/5/2024 and 6/26/2025 with Remote Power Modules (RPM) modules, can experience loss of RPM functionality as well as other electrical system concerns. Kernel 753 was released to DLB on 6/26/2025 to address these concerns.
This document is to inform dealers, customers, and body builders/TEMs of a known BCM software issue with kernels 747 through 752.
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Units built after November of 2024 as well as older units that were updated with DLB between 11/5/2024 and 6/26/2025 with Remote Power Modules (RPM) modules, can experience loss of RPM functionality as well as other electrical system concerns. Kernel 753 was released to DLB on 6/26/2025 to address these concerns.
This document provides: Steps to take when switch pack programming fails, or when switch pack disappears after body...
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control module update Sample scenarios Additional information to assist readers in understanding DLB switch pack programming
Title: Erratic BCM and RPM Behavior with Kernel 747-752 Applies To: All MV, HV, HX with RPM modules
This document details the procedure that must be followed to ensure proper alternator troubleshooting.
Cummins B6.7 Grid Heater Relay
General Wheel Speed Sensor Troubleshooting
Fifth Wheel Unlock - Trailer Lamp Detection Calibration.
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Only models equipped with BCM feature code 597017
N2 telematics module not communicating with OCC systems.
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Only models built with feature codes 10ADT, 10AEY, 10AEU, 10AEZ, 10AGB, or 10AGC built from 04/04/2019 through 11/01/2022.
PicoScope Test - Battery Loss of Charge - Parasitic Draw Test
PicoScope Test 5V & 12V Intermittent Open and Short circuit diagnostics
New or replacement body control Module (BC,BCM) not detected; Gen 4 BCM
General wheel speed sensor troubleshooting
Cummins B6.7 Grid Heater Relay
Certain International HV and MV Series trucks, and DuraStar and WorkStar model trucks, the battery ground circuit...
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interconnect cable may have been made with RED insulation instead of BLACK.
Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
Multi Module Programming Information for In-Cab Modules
Multi Module Programming Information for In-Cab Modules
The Remote Power Module (RPM) data link circuit may be pinned incorrectly, resulting in potential PTO operation issues.
Ambient Air Temperature (AAT) Sensor Faults/Location/Diagnostics
Multi Module Programming Information for In-Cab Modules
Body & Paint
20 bulletinsIn some instances, the driver's or passenger's door pod may become unresponsive, where it will not respond to any manual...
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inputs from the driver or passenger. In some of these situations, it is possible for this symptom to be present without any fault codes becoming active. This article will guide the user through performing a hard reset of a door pod, which can restore the door pod to its operational condition, thereby avoiding the need for replacement. The steps in this article should be performed BEFORE diagnostics are completed for any active faults.
This article addresses chassis lean conditions on all chassis.
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This does not include any diagnostics for body leans such as a cab lean. Keep in mind that a chassis lean may cause or accentuate a cab lean. Filling out the printable form and using the notes in blue will help you to determine the source of the lean and identify the action and parts required to correct the lean.
Cab water leak trouble shooting tips
Water leaks past plastic vapor barrier sheet in the inner cavity of the cab entry door
Cab water leak troubleshooting tips; HX with steel cab only
Cab water leak troubleshooting tips
Aftertreatment Clamp Corrosion; Single Can Aftertreatment Systems
Day cab roof air deflector causing loud vibration noise at highway speed
Programming Procedure for Center Panel Switch Packs
Programming Procedure for Center Panel Switch Packs
Programming Procedure for Center Panel Switch Packs
Programming procedures for the center panel switch packs has changed.
Chrome Plated C-Loop Mirror Flat Glass Cracks
Windshield Replacement on trucks equipped with Lane Departure Cameras; Only RH, LT, and Medium duty with feature codes...
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008TTG, 0008TPU, 0008TTT, 0008TTU
Day Cab Roof Air Deflector Vibrates against Cab Roof; only models with P/N 4067947C92 Roof Air Deflector
Water Leaks Past Plastic Vapor Barrier Sheet in the Inner Cavity of the Cab Entry Door
Wind noise at upper side of cab door due to door out of alignment
Cab Door Latch Stuck, Door will not open
Cab Door Latch Stuck, Door will not open
The First Check to make when Troubleshooting any Body Controller or ESC Issue
Infotainment
8 bulletinsThis tool is designed to compare Diamond Logic feature data across multiple vehicle configuration files.
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It allows users to quickly load files either manually or directly from the Diamond Logic Builder Vehicles folder using VIN-based selection. As files are added or removed, the comparison runs automatically with no manual action required. The program presents results in an interactive table that shows feature codes, descriptions, access levels, and whether each feature is present in each selected file. Built-in search, filtering, and sorting make it easy to locate specific features or focus only on differences between files. Column visibility can be customized to show or hide descriptions and access information as needed. Users can remove files individually or clear all files at once, with results updating instantly. The tool also includes reporting and export options that reflect exactly what is visible on screen, allowing results to be printed, copied, saved as text, or exported to CSV for use in Excel or other spreadsheet tools. Overall, the program streamlines the process of comparing vehicle feature configurations, helping users quickly identify differences, validate setups, and document results without manual comparison or external tools.
Radio clock changes time automatically; Only vehicles built after March 2020 and excluding CV
Bluetooth Cannot Be Connected to Radio
Radio Diagnostics and Information
NEW Ultrasonic DEF Head Unit; All SCR vehicles
NEW Ultrasonic DEF Head Unit available; Only models equipped with SCR Aftertreatment.
NEW Ultrasonic DEF Head Unit; Only vehicles Equipped with SCR
NEW Ultrasonic DEF Head Unit; only models equipped with SCR Aftertreatment
Transmission
7 bulletinsThis document is to notify the field of an issue with BCM that causes various electrical system concerns after the vehicle sits for 2-3 days.
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This can affect all LT, RH, MV, HV models, 2021MY and up HX, 2024MY and up CE Bus with BCM kernel version 752, 753, and 754. Vehicles built or updated with DLB between 6/1/25 and 11/4/25 are suspected of having these kernels installed on the BCM. The most common complaint is that the steering wheel switches do not function, which, depending on the vehicle model and options, can cause the bus door, pupil warning lights, radio controls, marker interrupt, and cruise control to stop working. Other complaints can include short circuit faults from multiple sensor circuits attached to the BCM setting at the same time, the vehicle will not go into gear, the headlights are stuck on, the brake lights are stuck on, or the parking brake alarm is sounding (horn chirping) with the parking brake set. As of 11/4/25, these symptoms can be resolved by updating the BCM to kernel 755 or later with DLB.
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
Power Steering Diagnostics Flow / Pressure Specifications For Power Steering Gears and Power Steering Pumps
Auxiliary Transmission Diagnostics; only models with feature code 0013607 or 0013PNB controlled by DLB feature 0597268
Torque Converter parameter setting may have been programmed incorrectly at time of manufacture.
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Only Heavy duty HV and all HX.
DUAL STEERING GEAR AIR BLEED PROCEDURE
Suspension
4 bulletinsThis document reminds technicians of the critical relationship between the truck's suspension and the driveline operating angles.
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The information applies to diesel, gas, and electric vehicles.
Front cab mount bushings/insulators MV, HV, DuraStar, and WorkStar vehicles used in severe vocations
Suspension Lean Diagnostics; All models
The steer axle hubs may not have lubricant filled to the proper level at time of assembly which may result in wheel...
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bearing damage and in extreme instances, separation of the wheel from the front axle.
Tires & Wheels
4 bulletinsTire Pressure Monitoring system; Feature Codes 16VLS, 16VUY, 16VVA, 16VVM, or 16VUZ
Tire Pressure Monitoring systems (TPMS); Only LT, RH, HV, HX, or MV series trucks with feature code 16VLS, 16VUY,...
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16VVA,16VUZ, or 16VVM
16VLS, 16VUY, 16VVA, and 16VUZ Tire Pressure Monitoring System (TPMS).
Suggested alignment target values when performing a vehicle axle alignment
Brakes
3 bulletinsThis document will guide the user through a step-by-step procedure for detecting water leaks in vehicle cabs and...
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windshields using an ultrasonic sound detector.
This document is to guide users to eliminate brake pedal rattle noise.
Horizon Cab Door Field Replacement and the Side Window Air Deflectors.
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NOTE: This article will only be applicable to cabs with the deflector mounted on the door pillar. If the cab has the deflector at the windshield, this article does not apply.
Fuel System
3 bulletinsA26 & S13 Fuel Gelling
Certain International LT, HV and RH Series trucks may have the incorrect EGRV mounting bolts installed.
Winter Fuel Or Additive Use Required Pop-Up Message
Lighting
3 bulletinsLane Departure Warning Alert Active with Turn Signals On; Only models equipped with Lane Departure Warning
The upper fan ring shroud support bracket may have been assembled with an insufficient weld between the bracket and its...
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mount which may cause the weld at the bracket to crack.
Repair Procedures for Vehicles Struck by Lightning
Pre-Delivery & Maintenance
2 bulletinsTitle: Service Portal iKNow Feedback Case Types Applies To: All
Frame Rail Straightness Inspection Procedure
HVAC & Climate
2 bulletinsTitle: A/C Refrigerant and Oil Capacities Applies To: All current models
A/C Refrigerant and Oil Capacities
Software & Calibration
2 bulletinsQLS Emergency Calibration Revert Process
QLS Emergency Calibration Revert Process
Steering
1 bulletinSteering Noise in Vehicles Equipped with Dual Steer