5-Piece Fuel Injector Set – OEM #12589465 / 12586684

Keep your engine running at peak efficiency with this set of 5 replacement fuel injectors compatible with Isuzu i-350, Isuzu i-370, GMC Canyon, Hummer H3, and Chevrolet Colorado. Featuring OEM reference numbers 12589465 and 12586684, these injectors are engineered for a precise fit and reliable fuel atomization, helping restore proper throttle response and smooth engine operation.

Key Features

Set of 5 injectors — replace the full bank for consistent performance across all cylinders
OEM Part Numbers: 12589465 / 12586684 — direct cross-reference for accurate fitment
Wide Vehicle Compatibility: Isuzu i-350, Isuzu i-370, GMC Canyon, Hummer H3, Chevrolet Colorado
Precise Fuel Atomization: Optimized spray pattern for efficient combustion and smooth idle
Durable Construction: Built with quality materials designed to withstand high-heat, high-pressure engine environments
Plug-and-Play Design: Direct-fit replacement — no modification required for listed vehicles

Compatibility Guide

Make	Model
Isuzu	i-350
Isuzu	i-370
GMC	Canyon
Hummer	H3
Chevrolet	Colorado

What's in the Box?

5 × Fuel Injectors (OEM Ref: 12589465 / 12586684)

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Learn more: FuelEconomy.gov on vehicle maintenance

Frequently Asked Questions

Q: What vehicles are compatible with the 12589465 / 12586684 fuel injectors?

A: These fuel injectors are designed to fit the Isuzu i-350, Isuzu i-370, GMC Canyon, Hummer H3, and Chevrolet Colorado. Always verify your specific model year and engine code before installation to ensure correct fitment.

Q: How many injectors come in this set?

A: This listing includes a complete set of 5 fuel injectors, allowing you to replace the entire bank at once for consistent, balanced engine performance across all cylinders.

Q: Are these direct-fit replacement injectors?

A: Yes. These injectors are designed as direct-fit replacements referencing OEM part numbers 12589465 and 12586684, requiring no modification for the listed compatible vehicles. We recommend professional installation if you are not experienced with fuel system work.

Q: What is the benefit of replacing all injectors at the same time?

A: Replacing the full set ensures uniform fuel delivery across all cylinders. Mismatched injectors — some new, some worn — can lead to uneven combustion. Replacing them as a set helps maintain a smooth idle, consistent throttle response, and optimal fuel efficiency.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.