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Service bulletins for the 2005 Isuzu H-Series

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.

44 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
WB11-X-001A2023-11-06. Service bulletin. ENGINE AND ENGINE COOLING. The following information is provided to clearly explain Isuzu’s 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.
IB09-X-004C2022-08-02. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. The 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.
IB19R0012019-07-22. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. ISUZU PROVIDES OPTIONAL ENGINE BLOCK HEATERS AND OIL PAN HEATERS WHICH ARE DESIGNED TO WARM THE ENGINE COOLANT AND ENGINE OIL ENOUGH DURING EXTREME COLD TEMPERATURES TO ALLOW EASY STARTING. OIL GETS THICKER (MORE VISCOUS) AS IT GETS COLDER, WHICH SLOWS DOWN THE ENGINE CRANKING SPEED. TO ENSURE THAT THE ENGINE CAN TURN OVER FAST ENOUGH TO START WHEN PREVAILING TEMPERATURES DROP, USE THE RECOMMENDED VISCOSITY ENGINE OIL AS SET FORTH IN THE VEHICLE'S OWNER'S MANUAL.
IB19X0042019-07-22. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. CALIFORNIA LAW REQUIRES THAT A PROFF OF CORRECTION CERTIFICATE ("POC CERTIFICATE") BE COMPLETED FOR EVERY MOTOR VEHICLE EMISSIONS CAMPAIGN/RECALL (IF ANY) THAT IS APPLICABLE TO A MOTOR VEHICLE IN ORDER FOR THAT VEHICLE TO BE REGISTERED IN THE STATE OF CALIFORNIA. CALIFORNIA REQUIRES THE POC CERTIFICATE TO BE PINK IN COLOR AND TO BE SUMBITTED IN PERSON AT A CALIFORNIA DEPARTMENT OF MOTOR VEHICLES ("DMV"). THE CALIFORNIA DMV WILL NOT ACCEPT POC CERTIFICATES THAT ARE SENT BY MAIL, EMAIL OR OTHER FORM OF ELECTRONIC TRANSMISSION.
PIP4925B2019-03-18. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. This preliminary information document communicates a tip on the way to diagnose possible induction or exhaust air leaks using the evaporative emission cart smoke machine and ultrasonic leak detector tools.
PIP5540D2019-03-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIP56282019-03-11. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
00-06-01-012G2018-05-21. Service bulletin. ENGINE. This informational bulletin advises the possible issues that may occur using a scotch brite pad or highly abrasive disk on engine surfaces.
PIP52322018-05-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIP5232B2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIT3173C2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician that fluid contamination may be directed to one of the following testing centers according to the type of fluid needing testing. Dealer should send the correct fluid to the proper testing center.
PIP51632017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible cause of engine oil consumption, misfire, cylinder leakage or blow by. Technician will need to inspect the engine for Cylinder damage or scoring, An out of round cylinder bore, Dirt intrusion, and Catalytic Converter failure.
PIP5029G2017-05-16. Service bulletin. ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT HAVE A MALFUNCTION INDICATOR LAMP ON OR ENGINE MISFIRE, ROUGH IDLE, EXTENDED CRANK, OR CRANK NO START IN SOME CASES. TECHNICIAN WILL NEED TO PERFORM PUBLISHED SERVICE INFORMATION DIAGNOSTICS. IF TECHNICIAN FINDS CARBON, AN UPPER ENGINE AND VALVE CLEANING SHOULD BE PERFORMED.
IB-12-J-003-B2014-05-01. Service bulletin. ENGINE. ISUZU: INFORMATION CONCERNING THE INSTALLATION OF THE FUEL INJECTOR PIPES INTO A LONG BLOCK ASSEMBLY. 1999 - 2002 ISUZU FSR/FTR/FVR, 1999 - 2009 CHEVROLET OR GMC T6500/T7500/T8500, 2000 - 2004 CHEVROLET OR GMC WT5500, 2000 - 2004 ISUZU FRR, 2003 - 2009 CHEVROLET OR GMC C6500/C7500/C8500, 2004 - 2009 ISUZU FTR/FVR/FXR, 2005 - 2007 ISUZU HTR/HVR/HXR, 2005 - 2010 CHEVROLET OR GMC W3500/W4500/W5500, 2005 - 2015 ISUZU NPR/NPRHD/NQR/NRR, AND 2013 - 2014 ISUZU NPR. *JS
CB-13-J-001-A2013-06-20. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. ISUZU: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SOME VEHICLES WILL DEVELOP A CRACK, OVER TIME, IN THE EXHAUST MANIFOLD RESULTING IN INCREASED NOISE DURING OPERATION. MODELS 2004-09 FTR/FVR/FXR, 2004-09 C/T SERIES, 2005-07 H SERIES. *PE
SB-12-J-0052012-10-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. ISUZU (CHEVROLET/GMC): TRUCKS WITH DIESEL ENGINE WOULD HAVE IDLE VIBRATION, TROUBLE STARTING, ENGINE NOT REVVING UP, AND A LACK OF POWER DUE TO POSSIBLE OPERATION CONDITION OF SUCTION CONTROL VALVE (SCV)/FUEL RAIL PRESSURE (FRP) REGULATOR BEING INTERMITTENT. MODELS 2004-2010 CHEVROLET/GMC C, T, W SERIES AND ISUZU F, H, N SERIES. *PE
CB-10-X-0012011-07-13. Service bulletin. EQUIPMENT:OTHER:LABELS; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. ISUZU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE EMISSIONS LABEL WAS INSTALLED INCORRECTLY SO IT CANNOT BE SEEN. 2005-2007 H SERIES. *RM
CB-10X0012011-01-07. Service bulletin. EQUIPMENT:OTHER:LABELS; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. ISUZU SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. VOLUNTARY EMISSION SUPPLEMENTAL LABEL RECALL. VEHICLES WERE BUILT WITH THE ENGINE EMISSION LABEL INSTALLED IN A LOCATION THAT IS VISUALLY OBSTRUCTED BY THE AIR CLEANER. LABEL CAN BE INSTALLED ON THE UNDERSIDE OF THE HOOD. CSC LETTER WAS RECEIVED. *PE

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.