0445120042 8973613556 Fuel Injector for Chevrolet and GMC LBZ Models

0445120042 Common Rail Injector Overview

The 0445120042 common rail diesel fuel injector is a new aftermarket replacement for GM 6.6L Duramax LBZ engines. It cross-references Isuzu number 8973613556 and GM numbers 97361355, 97780358 and 97780474. This product is supplied as one complete injector assembly rather than an internal nozzle or injector repair kit.

The injector meters and delivers high-pressure diesel fuel into the combustion chamber according to the engine control system. Correct injector identification is important for stable fuel delivery, engine response and common rail system operation.

Fitment and Installation Checks

Before ordering, compare the number on the removed injector with 0445120042 or 8973613556 and confirm that the vehicle uses the 6.6L Duramax LBZ engine. Vehicle model or engine displacement alone may not be sufficient because similar Duramax engine generations can use different injectors. Provide the VIN, model year, engine code and old injector number when fitment is uncertain.

Installation should be completed by a qualified diesel technician under clean working conditions. Inspect the fuel system for contamination, follow the vehicle manufacturer’s tightening and sealing procedures, and complete any required injector coding or relearn procedure after installation.

FAQ

Does 0445120042 replace 8973613556?

Yes. The numbers 0445120042 and 8973613556 identify interchangeable references for this common rail injector application.

Which engine uses this injector?

This injector is intended for GM 6.6L Duramax LBZ diesel engine applications. The engine code and original injector number should be checked before ordering.

Is this a complete injector or a repair kit?

It is one complete common rail fuel injector assembly. It is not an internal nozzle, control valve or injector repair kit.

How many injectors are supplied?

The product is supplied as one injector per package. Confirm the required order quantity when replacing multiple injectors.

What is the warranty?

The standard warranty for this new aftermarket replacement injector is 6 months.