2024 International LT TSBs
130 Technical Service Bulletins across 15 categories
Categories
Engine
42 bulletinsThis document will guide the user through to inspect A26 turbochargers remanufactured by SRC between 05/01/2023 and 02/01/2025.
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SRC Turbochargers assembled with new compressor housings may have a defect that prevents the TCOT sensor (Part# 1845988C1, Sensor, Exhaust Gas Temp) from being installed correctly.
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 instructions for sealing oil leakage past the flywheel bolt holes on S13 engines.
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Oil leaking from behind the crankshaft gear may exit through the flywheel bolt holes and is often misdiagnosed as a rear crankshaft seal leak. This condition is confirmed by oil-saturated flywheel bolts and visible oil pooling in the flywheel bolt holes behind the gear.
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.
The purpose of this article is to provide the user with the necessary tools and related manuals to maintain, diagnose,...
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and repair an Espar Hydronic S3 Heater (GEN 3). The Espar Hydronic S3 (GEN 3) Auxiliary Heater is a diesel-fired coolant heater for maintaining cabin heat without running the engine. The heater uses fuel from the fuel tank to heat coolant before it goes to the heater core in the sleeper HVAC unit. The heater is located under the cab's sleeper area and is powered by the vehicle's batteries.
This document provides instructions for the programming changes that will be needed when performing an S13 engine swap.
This document provides instructions for the programming changes that will be needed when performing an S13 engine swap.
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 40F (4C), including high levels of humidity, an operator...
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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 currently available winter front covers that can be installed on the front grille and bumper to reduce cold air flow to the engine compartment.
This document will guide the user through diagnosing an intermittent shutdown complaint on a 2021 A26 (A26B), whether...
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the vehicle is coming to a stop or sitting at idle.
This document aims to enable technicians to: 1.
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Accurately identify S13 engine control systems. 2. Understand the programming intricacies related to these systems. 3. Autonomously complete programming tasks without needing technical support.
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
: Programming Instructions For S13 Engine Swaps
: A26 Turbochargers remanufactured by SRC between 05/01/2023 and 02/01/2025
This document will guide the user through Various field repairs to eliminate the engine hood squeaks, rattles, knocking,...
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and bouncing on International LT and RH. For any other hood alignment or adjustment issues, please refer to the current truck service manual for LT and RH for the proper procedures.
In the event of a backorder of A/C compressor PN 4158126C1, it may be necessary to use a 2017 X15 A/C compressor PN 3863068C4 on a 2021 X15 engine.
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This document will guide the user through modifying the 2017 X15 A/C compressor to be used on a 2021 X15 engine. The 2017 Cummins X15 engine uses a compressor that is physically identical to the 2021 Cummins X15 engine compressor, with the exception of the electrical connector.
This document will guide the user how to update the calibration revision history for S13 EPA 2024 engines.
This document will guide the user through relocating the No-Idle system's voltage sense source from the battery to the...
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interior sleeper PDM.
This document will guide the user through various field repairs to eliminate the squeaks, rattles knocking of the engine...
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hood on International LTs and RHs
This document provides instructions for the programming changes that will be need when performing an S13 engine swap
This document will guide users to eliminate the squeaks, rattles or knocking created from the engine hood.
Using a longer bolt for S13 Engine Cooler Housing
Guide users through various field repairs for eliminating the squeaks, rattles, knocking of the engine hood
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
No Idle HVAC run time shorter than expected - Bregstrom; Only Sleeper cab models with feature code 16UZL or 16VLN.
How to request a horsepower quote; all International and Cummins engines
Snap-On torque wrench requirement for all big bore engine connecting rod bolts; A26, MaxxForce 13, N13 engines
Removal and Installation of the Air Cleaner Assembly Cover and Air Filters; All Engines and only HX and LT series trucks...
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with feature code 012VCB or 012VBZ Air Cleaner Assembly
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
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
Other
25 bulletinsThis document will provide information regarding certain approved S13 and T14 chemicals.
This document will guide the user through parts information and installation instructions for the IMP Isolation Kit.
VIN and Incomplete Vehicle Document Label Replacement Procedure
This document will provide information regarding certain approved S13 and T14 chemicals.
This document will guide the user through troubleshooting steps to submitting a case file for a horsepower request.
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
Title: Parameters for 16UZL with 16VKW Applies To: Vehicles with both feature codes 16UZL and 16VKW
Switch Pack Programming Troubleshooting Information
Title: Connecting an Auxiliary APU to the S13 Coolant System
Title: Supplemental A26 MAF Fault Diagnostics
Applies To: Units built 12/20/2022 - 11/11/2024 On the following models with Feature Codes: CE Bus- 0510234 LT RH-...
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001MBS & 0510234 LT RH- 008TRR or 0510234 & 001LRM or 001LRV or 001LRN or 001LRL
This document will guide the user through inspecting the shark fin antenna cable for rubbing/chafing at the mounting hardware.
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In some cases, cable damage has been seen where the antenna cables pass over the mounting hardware. This cable damage can cause the fault codes listed below, intermittent operation of the predictive cruise control, and issues with OCC report uploading.
This document is used to help guide through fault codes.
This document will guide the user how to addresses chassis lean conditions on all chassis.
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 users to setup PTO functionality parameters on the S13/T14 Intergrated Powertrain.
J1939 Data Link Source Address Information
Diagnosis of chassis wander complaints.
J1939 Data Link Source Address Information
J1939 Data Link Troubleshooting
Cab Deflector Extension
Auto Start Stop Information and troubleshooting; Only LT with feature code 08TSJ
Telematics installation guidelines - Only units with 500K data link
Fuel System
17 bulletinsThis article will provide the calibration revision history for S13 Integrated EPA 2024 Powertrains.
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NOTE: Calibrations will update to the most recently released calibration. The latest calibration content will include all previously released calibration content. NOTE: International utilizes campaigns and diagnostics to assess the necessity of calibration updates. Warranty claims may be denied if there is no active campaign or if diagnostics do not indicate that a calibration update is required.
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over...
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tube installation.
This article will provide the calibration revision history for S13 Integrated EPA 2024 Powertrains.
This document will guide the user through the parts and information related to A26B resonator removal and EGR cross-over...
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tube installation.
This article is to walk through and assist the technician in diagnosing and repairing some of the known leaks around the...
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S13 Integrated Powertrain.
This document will guide the user through supplemental fuel system diagnostics on 2017 A26 ESN 4500000 - 4599999.
Some interaxle shafts (the driveshaft connecting 2 drive axles) utilise special phasing.
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This is by design to reduce torsional vibrations. See Dana/Spicer letter here & Meritor here. Dana DS404 rear axle housing families use offset interaxle driveshaft phasing to reduce torsional vibrations. Depending on the interaxle driveshaft series, the phasing will be different. Vehicles built with 0417LTFXXXX drivelines until 03/23/2009 use 32 degree phasing, while vehicles built with 0417LTGXXXX drivelines from 3/12/2009 to current use 48 degree phasing. There is an overlap of 11 days where either shaft could have been used.
This document will guide the user through the parts and information related to A26B resonator and EGR cross-over tube...
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installation.
This article will provide the calibration revision for S13 Integrated EPA 2024 Powertrains
Title: Export Recalibration Process & Emissions Label - A26 Applies To: Service Manager, General Manager, Technicians.
Title: S13 Integrated Powertrain Known Leaks
his article will provide the necessary resources to set up PTO functionality parameters on the S13/T14 Integrated...
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Powertrain, primarily if PTO is installed after production.
This article will provide the necessary resources to set up PTO functionality parameters on the S13/T14 Integrated...
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PowerTrain, primarily if PTO is installed after production.
Setup PTO functionality on the S13/T14 integrated Powertrain
S13 Integrated operational behavior
A26 & S13 Fuel Gelling
S13 Exhaust leak from aftertreatment system housing
Electrical
16 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 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: Battery Disconnect Switch Replacement - Best Practices Applies To: All Models with Battery Disconnect Switch
This document will guide the user through updating BCM feature 597765 and install 4124040C2 in the switch packs.
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Apply EFIX 1154
The Exhaust Gas Sensor In-Use Monitor Performance Ratio (IUMPR) may operate below the prescribed standard.
This document details the procedure that must be followed to ensure proper alternator troubleshooting.
This document covers battery diagnostics, maintenance and storage requirement.
LT & RH aftertreatment PDM F2 fuse falling out or cracking.
24A02 EFIX for addressing BCM programming for no FLR icons/messages in cluster
LT / RH Aftertreatment PDM F2Fuse Falling out or Cracking
Aftertreatment PDM F2 fuse falling out or cracking.
Corroded TPMS Receiver / Repeater Module Connectors; only models equipped with feature code 16VLS or 16VVM
Certain LT and RH series trucks with Lane Keep Assist (LKA) may have outdated software in the LKA Electronic Control...
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Unit (ECU), resulting in false positive fault codes. A software update will resolve this issue.
General Wheel Speed Sensor Troubleshooting
Fifth Wheel Unlock - Trailer Lamp Detection Calibration.
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Only models equipped with BCM feature code 597017
Transmission
6 bulletinsThe purpose of this document is to properly identify and repair a leak at the rear gear housing boss.
This 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: S13 Gear Housing Leak (By The Air Compressor) Applies To: S13 Integrated Powertrain LT RH HX
Title: Steering Gear Seal Repair Guidelines Applies To: Steering gears
Title: S13/T14 Transmission Cooler Pipe or Clamp Leak Troubleshooting and Repairs
Endurant Plumbing Retrofit; only models built with endurant transmission built before 11/01/2023
Brakes
5 bulletinsThis document is intended to provide supplemental information for concerns with brake light switches and pressure...
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sensors used by the BCM and PIM module to determine if the operator of the vehicle is applying the service brakes. All S13 vehicles are equipped with BCM feature 597483 (BCM PROG, BRAKE SWITCH, Use With Brake Application Pressure Switch).
This 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 intended to provide supplemental information for concerns with brake light switches and pressure...
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sensors used by the BCM and PIM module to determine if the operator of the vehicle is applying the service brakes. All S13 vehicles are equipped with BCM feature 597483 (BCM PROG, BRAKE SWITCH, Use With Brake Application Pressure Switch). 597483 uses a normally open brake pressure switch that closes with 2-6 psi of air pressure and a brake application pressure sensor. When the switch is closed or the pressure sensor reads higher than 4psi, the BCM considers the brakes applied and will broadcast that over the J1939 networks to other modules. The S13 also includes a redundant brake switch that is wired directly to the PIM. This switch is normally closed and opens with 2-6 psi of air pressure. If the S13 ECM believes the brakes are applied from one of these brake signals, it can reduce or completely cut throttle input.
Brake charging system have a missing manifold fitting to connect the low-pressure alarm.
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Low pressure alarm is not working.
This document is to guide users to eliminate brake pedal rattle noise.
Body & Paint
5 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.
This document will guide the user through installing the upper mounting hardware in place of the missing C-Loop and/or...
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look down mirrors.
This document will guide the user through installing the hood support bracket kit
Hood guide installation
Software & Calibration
3 bulletinsThis article provides step-by-step guidance for troubleshooting issues with Techline Connect software.
Title: Update calibration to RC4 Applies To: Vehicles Marked In Service Portal
Update to International Preventative Maintenance
HVAC & Climate
3 bulletinsTitle: A/C Refrigerant and Oil Capacities Applies To: All current models
This document provides guidance on the available parts kits for servicing the A/C system in the event of a catastrophic failure.
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These parts kits will include all the necessary components needed to repair a catastrophic failure, with the exception of the A/C compressor
Potential A/C Compressor Parts shortage - 4158126C1 (A/C compressor)
Lighting
2 bulletinsThis document will guide the user through replacement of the two hose clamps at the right rear coolant distribution...
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housing to the large coolant return tube leading to the thermostat housing (Figure #1). The original clamp design may not be adequate to maintain the proper clamping force in the event the rubber hose relaxes. The steps below will outline the installation of a new design constant torque clamp in this location.
Title: S13 Leaks at the Coolant Return Pipe Hose Clamps
Tires & Wheels
2 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
Infotainment
1 bulletinThis 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.
Pre-Delivery & Maintenance
1 bulletinTitle: Service Portal iKNow Feedback Case Types Applies To: All
Steering
1 bulletinTitle: S13 New Power Steering Tube Support Brackets
Suspension
1 bulletinThis 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.