AUTO OCCASION Fuel Injector Repair Seal Kit 8‑Set for 99–07 GM 4.8/5.3/6.0L — O‑Rings, Caps & Micro Filters

AUTO OCCASION 8Set Fuel Injector Repair Seal Kit is a complete replacement seal set engineered to restore injector sealing and fit most 1999–2007 GM 4.8/5.3/6.0L V8 injectors used in Chevy Silverado and GMC Sierra models.

This repair kit provides the common O-rings, caps, buckles and micro filters needed when servicing fuel injectors on compatible GM engines. Rather than replacing the entire injector assembly, technicians and DIYers can use these precision-molded seal components to stop leaks, reduce fuel odor, and maintain proper injector sit. The kit lists part numbers that correspond to original-equipment and common aftermarket injector designs, and it’s offered as an economical way to refresh worn seals during routine maintenance or injector replacement.

Will this kit fit my 99–07 Chevy or GMC V8?

Compatibility covers many FJ887-style injectors and the commonly used 4.8, 5.3, and 6.0-liter GM V8 applications from 1999 through 2007. Use the part numbers and pictorial comparison to verify fit before ordering. Always compare your vehicle’s injector appearance and dimensions to the kit components if you are unsure.

• Fits many Chevy Silverado 1500 and GMC Sierra models 1999–2007
• Corresponds to part numbers like 12580681, 17113553, 25317628
• Designed for FJ887-style injector bodies and common OE shapes
• Double-check year, make, model and inspect original parts visually

What parts are included and how do they help during a repair?

The set contains eight full service seal assemblies: O-rings, injector caps, micro filters and retaining buckles where applicable. Each element replaces the wear-prone rubber and plastic parts that age or fail, allowing the injector to seat correctly and filter inlet contaminants.

• O-rings: restore a fuel-tight seal at rail and injector interfaces
• Caps: protect the top of the injector and secure electrical connection
• Micro filters: trap debris before it enters the injector body
• Buckles/retainers: hold the injector firmly in the fuel rail

How do I install the repair seals and what should I watch for?

Installation is straightforward for anyone with basic mechanical skill: remove the injector from the rail, remove old seals and filters, then install the new components in the same orientation. Use a light lubricant approved for fuel systems if needed and avoid over-stretching rubber parts. Inspect injector pintle and body for damage; seals won’t fix cracked or corroded components.

• Remove fuel pressure and disconnect battery first for safety
• Compare new seals visually to old ones before fitting
• Lubricate seals lightly with fuel-safe grease for easier seating
• Replace any injector that has broken plastic or visible cracks

Can I rely on this kit instead of buying new injectors?

For leaks and seal-related issues, replacing seals and filters is a reliable, cost-effective repair that can extend the service life of existing injectors. However, if the injector has electrical faults, clogged internals beyond the filter, or mechanical failure, a full injector replacement or professional cleaning may be necessary. Use the kit as part of diagnostics: if problems persist after seal replacement, further injector evaluation is recommended.

• Ideal for fuel leaks, fuel smell, and loose seating issues
• Not a solution for failed solenoids or damaged injector nozzles
• Serves as part of routine injector maintenance or reconditioning
• Follow replacement with a leak test and short engine run check

Who is this for: This AUTO OCCASION seal kit is aimed at professional mechanics, independent garages, and experienced DIYers who maintain or rebuild GM V8 fuel systems from 1999–2007. It is especially useful for anyone looking to repair leaking injectors or perform preventative maintenance without the higher cost of full injector assemblies. Before purchasing, verify the fit by checking the listed part numbers and visually matching your existing injectors to the kit components.