2020 Isuzu N-Series

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 11011556This information bulletin outlines the service procedure for installation of fluid level indicator joint tube anytime the aisin transmission IS removed or oil pan IS removed and reinstalled to prevent water intrusion to transmission.
• 11011555This information bulletin outlines the service procedures for diagnosis and parts information for repair of the mobileye 6 system. Figure 1 below IS an example of the camera used on a mobileye 6 system. The procedure discussed in this bulletin must be used for repairing any mobileye 6 system.
• 11011551This information bulletin IS to remind dealers whenever the ipc assembly IS replaced in an affected isuzu manufactured vehicle, they are to affix an odometer replacement sticker, as the odometer IS not programmable. The sticker should be filled out completely with the date of replacement along with the mileage from the previous odometer reading, and the dealer code of the dealership replacing the ipc.
• 11007180Information bulletin: isuzu dealership personnel should encourage isuzu customers to follow the fuel system information outlined in the fuel section of their vehicles owners manual. Running an engine with gasoline contamination may lead to damage to the fuel system and/or catastrophic engine damage. Protect your customers engine from contaminated gasoline by recommending regular fuel system inspection and maintenance.
• 11007177Information bulletin: this bulletin applies to all oem and remanufactured engine and transmission assemblies, for the affected vehicles listed above, to be replaced under the isuzu new vehicle warranty, goodwill, isuzu parts warranty, gold star used truck warranty and/or all extended powertrain warranties offered by isuzu, as well as all over-the-counter engine and transmission assembly replacements.
• 11005686Information bulletin _some customers with n-series vehicles may notice an audible clicking or chattering noise coming from the rear of the vehicle while making tight turns. This condition may be due to limited slip differential lubricant additive not having been used during the last scheduled maintenance or in a previous repair. The condition can also result from delayed or skipped maintenance resulting in degradation of axle fluid.
• 10244945The following information is provided to clearly explain Isuzus policy for control module (engine, transmission, antilock brake, instrument panel, body control, power interface, etc.) reprogramming. Control module calibrations are regularly updated for many reasons. These reasons may include, but are not limited to: model year change, software corrections, certification compliance, product improvement and specific application requirements. However, the mere existence of a newer control module calibration does not necessarily mean that warranty coverage exists or that the calibration must be installed. It is not our policy to update control modules, under warranty or after warranty, based solely on the availability of a newer calibration file. Below are our guidelines for reprogramming control modules.
• 10244941This bulletin provides information with regards to the Isuzu Commercial Vehicle (CV) Service Policies and Procedures Manual (SPPM). The Isuzu CV SPPM (sections 2.15 and 2.16) provides detailed procedures related to vehicle storage up to and beyond 30 days. Performing these required procedures at the specified intervals will properly maintain vehicles until they are retailed. Failure to follow the procedures outlined may result in repairs and additional costs that could have been avoided. We are providing dealers with this brief overview of the recommended procedures as a reminder to maintain older inventory. Failures resulting from improper, or lack of, storage procedures are not covered under the vehicle factory warranty.
• 10244940In the past, replacement 6.0L gasoline and RPO KL8/LC8 Alternative Fuel Capable engines came as a certain configuration. These engines are now provided as different long block assembly configurations. The new configurations do not include many of the components that were provided with or pre-installed on the complete engine assemblies previously sold as replacement parts.
• 10244939Isuzu Commercial Truck of America, Inc. is distributing this procedure for adding keyless entry transmitters as a quick reference to help dealers better service the customer. Also included is the clearing procedure for customers who have had transmitters lost or stolen. This procedure may be used to clear all transmitters from the Keyless Entry Control Unit.
• 10241827The vacuum pump service part for affected vehicles listed in this bulletin has been superseded and is now the same vacuum pump that is the service part for the 6.6L gas engine. The updated pump requires the outlet vacuum hose be rerouted for proper fitment. Follow the service procedure below to install the updated replacement vacuum pump and reroute the outlet vacuum hose as set forth below.
• 10240367Isuzu is providing this bulletin to outline Isuzu's policy and procedures for Isuzu vehicles with Tire Warranty Coverage. NOTE: After the Isuzu Tire Warranty expires, additional coverage may be available from the tire manufacturer. Refer to the tire manufacturer's warranty booklet that was provided with the vehicle at the time of the sale.
• 10238687In the past, replacement 6.0L gasoline and RPO KL8 Alternative Fuel Capable engines came as a complete assembly. These engines are now provided as long block assemblies. The new configurations do not include many of the components that were provided with or pre-installed on the complete engine assemblies previously sold as replacement parts.
• 10238685IDA is a diagnostic program that provides: 1. DTC Analysis 2. DPF Early Regeneration Warning Detailed instructions on how to use the IDA are included in this bulletin.
• 10237147CONDITION General Motors LLC, the manufacturer of the engine in your vehicle, has determined that certain 2020-2023MY N-Series vehicles produced from 8/26/2020 through 7/31/2022 and equipped with 6.6L (L8T) gasoline engines may experience water intrusion into the Mass Air Flow (MAF) sensor connector. If water intrudes into this connection, you may experience engine performance issues as well as setting the Check Engine Malfunction Indicator Lamp (MIL). CORRECTION Dealers will replace the MAF sensor and apply additional sealing tape to the MAF connection for waterproof protection on affected vehicles. This service will be provided free of charge.
• 10237146This bulletin outlines the procedures for using the Alpine Exchange Program (the "Exchange Program"). The Exchange Program must be used when any Alpine radio or other component covered by this bulletin is repaired under warranty and may also be used for radio and component repairs not covered under warranty. Contact Alpine directly for pricing and payment methods applicable to radio and component repairs not covered under warranty.
• 10235685Isuzu Commercial Truck of America (ICTA) has been receiving warranty part returns that have aftermarket catalytic converters welded in place instead of the OEM catalytic converter. This is because vehicle owners who have had the OEM or Fleet Value catalytic converters stolen from their vehicles often replace the stolen catalytic converters aftermarket with non-Isuzu parts. When those replacement parts fail and cause the check engine light to illuminate, vehicle owners may seek to have the non-Isuzu replacement catalytic converter repaired or replaced under warranty. In fact, however, neither the new vehicle warranty nor the one-year replacement part warranty covers the failed non-Isuzu part.
• 10233458What is IDA? IDA is a diagnostic program that provides: 1) DTC Analysis: IDA analyzed DTCs (currently 35) and then provides quick and easy-to-understand repair solutions 2) DPF Early Regeneration Warning: IDA also reviews the three latest DPF regeneration odometer readings in the Health Report of the applicable VIN on IDA. IDA then analyzes the distances between the three regenerations. If the average of these distances is less than 55 km for a 4HK1 (5.2L) engine, or less than 70 km for a 4JJ1 (3.0L) engine, an alert will be shown on the IDA page in the form of a red regeneration icon. This is an early warning indication that a problem may be forming in the DPF regeneration cycle. However, if the enabling criteria shown above are not met, a regeneration icon will not appear on the IDA for that particular VIN. Detailed instructions on how to use IDA are included in this bulletin.
• 10233457In the past 6.0L gasoline engines came as a new long block assembly. These engines are now provided as remanufactured long block assemblies. The remanufactured configuration does not include some of the same components as the previous new long block configuration did.
• 10227157Isuzu Commercial Truck of America, Inc. is distributing this procedure for adding keyless entry transmitters as a quick reference to help dealers better service customer. Also included is the clearing procedure for customers who have had transmitters lost or stolen. This procedure may be used to clear all transmitters from the Keyless Entry Control Unit.
• 10225521We have received reports of the front turn signal lenses cracking on Isuzu vehicles. These lenses are cracking from the effects of being washed with alkaline detergents. Alkaline detergents are typically used in industrial settings and are reactive with the paint, metals, and other materials used to make up the exterior components of Isuzu vehicles. Isuzu recommends that only neutral detergents be used when washing Isuzu vehicles. However, if alkaline detergents are used to wash an Isuzu vehicle, it is crucial that all traces of the detergent are rinsed away with water or wiped off as necessary. Allowing alkaline detergent to dry on the turn signal lenses will cause them to crack. Each Isuzu vehicle is originally equipped with an Owner's Manual that includes guidelines for the proper exterior maintenance of the vehicle. The following guidelines are typical of those found in an Isuzu Owner's Manual concerning the use of detergents on a vehicle's exterior.
• 10225520All engines require oil to lubricate and protect the load bearing and internal moving parts from wear including cylinder walls, pistons, and piston rings. When a piston moves down its cylinder, a thin film of oil is left on the cylinder wall. During the combustion process, part of this oil layer is consumed. As a result, varying rates of oil consumption are accepted as normal in all engines. The purpose of this bulletin is to describe different instances where oil consumption occurs and to make available a worksheet to assist the technician in determining if oil consumption is excessive.
• 10222330Some customers with N-series vehicles may notice an audible clicking or chattering noise coming from the rear of the vehicle while making tight turns. This condition may be due to incorrect axle fluid having been used during the last scheduled maintenance or in a previous repair. The condition can also result from delayed or skipped maintenance resulting in degradation of axle fluid.
• 10218932Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these procedures in order to avoid delays in Parts Warranty claim payments and/or claim chargeback. This bulletin was revised to add a Parts Warranty Form
• 10218927Isuzu Commercial Truck of America, Inc. (ICTA) is providing the following procedural recommendations to improve dealer efficiency when submitting Parts Warranty claims. We strongly recommend dealers follow these procedures in order to avoid delays in Parts Warranty claim payments and/or claim chargeback.
• 10217004The Isuzu Commercial Truck of America (ICTA) Service Technical Assistance Center (TAC) provides diagnostic support to Isuzu dealer technicians repairing Isuzu vehicles in and out of vehicle warranty. A TAC case number will be issued solely for information tracking purposes and future contact reference.
• 10217001The following is a list of the Isuzu-recommended Threebond product part numbers identified in the various Isuzu Workshop Manuals and bulletins. If a Threebond product is unavailable, we recommend that you utilize the chart below to find equivalent of similar products (when available) from Loctite and Permatex.
• 10214877In response to requests from the field and in an effort to reduce cost of repairing the Aisin A465id 6-speed transmission, the following On-Vehicle procedures have been approved for repair at the dealer level. The following procedures have been approved for repair only. Refer to the Automatic Transmission sub-section Internal Harness (Wire to Solenoid) section in the appropriate Service Manual for diagnostic and other service procedures. In order to improve the quality of the original equipment manufacturer (OEM) and service replacement parts, we request that dealers capture TCM Freeze Frame Data for all Aisin A465id 6-speed transmission component parts replaced under warranty. The primary purpose of the TCM Freeze Frame Data is to obtain faster and more accurate quality information on the Aisin A465 6-speed transmission replaced components. The collected information will be used to improve the reliability of OEM and service replacement transmission components.
• 10213232Isuzu is providing this bulletin to outline Isuzu's policy and procedures for Isuzu vehicles with Tire Warranty Coverage. Tire Warranty, Policy, Procedure, and Claim Submission are the categories in this bulletin.
• 10209894On Isuzu N-Series Crew Cab Models, most engine and engine driven components for on-vehicle service, both for gasoline and diesel engines, can be accessed through the interior of the cab. There are 3 access points to create space for service and maintenance. The 3 access points are shown in the included images. Detailed information is now available in the Crew Cab section of all applicable Workshop Manuals (WSM). Please review the specific WSM for your vehicle for further details.
• 10209890This bulletin outlines the procedures for using the Alpine Exchange Program (the "Exchange Program"). The Exchange Program must be used when any Alpine radio covered by this bulletin is repaired under warranty and may also be used for radio repairs not covered under warranty. Contact Alpine directly for pricing and payment methods applicable to radio repairs not covered under warranty.
• 10209886Some customers may experience a "Crank No Start" condition in the vehicles listed. The following diagnosis might be helpful if the vehicles exhibits the symptom(s) described in this Information Bulletin. Condition/Concern On rare occasions, a crank no start may be encountered on a 6.0 V8 engine. During diagnosis, the technician will find proper fuel pressure, spark from each spark plug wire, and proper injector pulse. However, the following concerns will be noted during their diagnosis: low static compression, excessive cylinder leakage past an intake or exhaust valve, the engine may start but run poorly if the CMP sensor is disconnected, and/or the valve train may not move while cranking the engine. This concern may be the result of a sheared camshaft sprocket locating pin due to the camshaft seizing to the camshaft bearings at one time.
• 10209883Some customers may complain about wind noise and/or water intrusion into the cab from the driver and/or passenger doors of the affected N-Series and FTR trucks. To correct this condition Isuzu Commercial Truck of America, Inc. (ITCA) is offering a new door weather strip to improve sealing of the driver and passenger doors.
• 10208789The following table contains many possible causes for the following symptoms. -Hard Start/No Start -Rough, Misfire, Unstable or Incorrect Idle -Surges, Lack of Power, Hesitation, Lag or Stumble While some of these symptoms may lead to component replacement, the replacement should not be considered a completed repair. These types of symptoms have a high probability for a repeat repair since the true source of the failure is typically fuel contamination. In order to improve the overall repair and reduce the potential repeat failures, the procedure below is provided to assist in identifying the source of fuel contamination. Additionally, this bulletin will provide information to clarify the meaning of injector balancing rates and how to apply the values when trying to diagnose the Isuzu common rail fuel system.
• 10207648In response to requests from the field and in an effort to reduce repair costs of the Aisin A465 6-speed transmission, the following On-Vehicle procedures have been approved for service at the dealer level. The following procedures have been approved for repair. Refer to the Automatic Transmission sub-section Internal Harness (Wire to Solenoid) section in the appropriate Service Manual for diagnostic and service procedures. In order to improve the quality of the original equipment manufacturer (OEM) and service replacement parts, Isuzu now requests dealers to capture TCM Freeze Frame Data for all Aisin A465 6-speed transmission component parts replaced under warranty. The primary purpose of the TCM Freeze Frame Data is to obtain faster and more accurate quality information on all Aisin A465 6-speed transmission replaced components. The collected information will be used to improve the reliability of OEM and service replacement transmission components.
• 10206061Isuzu Commercial Truck of America, Inc. is proud to introduce the redesigned Isuzu Vehicle Health Report (VHR) program. Beginning October 2021, Isuzu dealers are able to access, through www.isuzutruckservice.com, all of the Isuzu Vehicle Health Report Data (MMU Data) associated with 2011MY and newer vehicles serviced by their dealership in a new, user friendly VHR. Look for the VHR tab after you log in. n contrast to the previous design, the new VHR exists in a central database easily accessed by dealership personnel at any time from any PC with internet access. Users will be able to quickly select vehicles by entering a VIN (partial or all 17 digits) or select from a list of the VINs most recently downloaded by their dealership to create a VHR.
• 10204470Diesel particulate filter.
• 10201566In an effort for continuous improvement, Isuzu has a need to obtain Mimamori ECU
• 10200123INTAKE MANIFOLD INSPECTION/REPLACEMENT AFTER SEVERE INTERNAL ENGINE DAMAGE - Severe Engine Damage, Broken Valves, Broken Pistons, and Piston to Cylinder Head Damage
• 10190786Condition in some 2020my isuzu n-series trucks equipped with 6.6L L8T gasoline engines, the original equipment engine oil dipsticks were incorrectly calibrated and the information in the vehicles' owner manual regarding oil capcity during maintenance IS inaccurate. As a result, it IS difficult for technicians to refil, adjust and measure the negine oil elvel accurately during vehicle maintenace. Correction isuzu dealers will replace the engine oil dipstick and owner manual so the engine oil level can be set correctly. (The relevant pages of the owner manual regarding teh specified oil level have been corrected and replaced.) this service will be provided free of charge.

Every Isuzu N-Series model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.