Technical Service Bulletin IB11-L-003D — 2021 ISUZU N-SERIES

THIS INFORMATION IS BEING ISSUED TO HELP DEALERS IDENTIFY APOTENTIAL SOURCE FOR FUEL CONTAMINATION. IF A CUSTOMER'S COMPLAINT LEADS TO THE DISCOVERY OF CONTAMINATED FUEL, THE SOURCE OF THE CONTAMINATION MUST BE FOUND AND REPAIRED. CONTAMINATED FUEL MAY RESULT IN MANY DIFFERENT FAILURES. SOME EXAMPLES OF THESE FAILURES ARE: PLUGGED FUEL FILTERS, POOR ENGINE PERFORMANCE, CHECK ENGINE LIGHT ILLUMINATION, FUEL SYSTEM (LINES AND TANK) CORROSION (RUST), ETC...ISUZU'S FAILURE INVESTIGATIONS HAVE FOUND A COMMON OCCURENCE OF THE FUEL FILLER NECK BEING INSTALLED INCORRECTLY. THIS POOR INSTALLATION WILL ALLOW UNWANTED MATERIAL TO ENTER THE FUEL TANK CONTAMINATING THE FUEL. USE THE INFORMATION BELOW TO CONFIRM THE FUEL FILLER NECK IS INSTALLED CORRECTLY. IF THE FILLER NECK INSTALLATION IS INCORRECT, USE THE INFORMATION BELOW TO REPAIR THE FUEL FILLER NECK. DETAILED INFORMATION REGARDING FUEL FILLER NECK INSTALLATION CAN BE FOUND IN ISUZU'S BODY BUILDER GUIDE.