GZGN FJ504 Fuel Injector for GM 5.7L/5.0L V8 (1996-2002) — Direct Fit, OE Replacement

GZGN FJ504 spider fuel injector is a direct-fit, OE-replacement injector designed for 1996–2002 GM and select Isuzu V8 engines to restore multi-port fuel delivery and spray pattern consistency.

When an aging injector causes rough idle, poor throttle response, or uneven fuel economy, replacing it with a correctly matched unit restores engine balance without expensive machining or tuning. This injector is built to replace factory OE numbers like 17114163 and 89060440 and fits many Chevy, GMC, Cadillac and Isuzu applications with 5.0L and 5.7L V8 engines from 1996–2002.

Which vehicles will this injector fit?

This GZGN FJ504 is engineered for a wide set of GM trucks, SUVs and vans plus select Isuzu models produced in the late 1990s and early 2000s. Fitment covers C/K-series trucks, Suburban, Tahoe, Yukon, Escalade, Express/Savana vans and Isuzu NPR V8s—verify OE numbers to confirm match.

• Direct replacements for OE numbers such as 17114163, 89060440, 2173029 and similar.
• Compatible with Chevy C1500/C2500/C3500, K-series, Tahoe, Suburban, Escalade (1996–2002 ranges).
• Works in GMC Sierra/Yukon/K-series, Savana, Express vans and Isuzu NPR V8 5.0L/5.7L.

How does this injector affect performance and fuel delivery?

The injector is built for multi-port fuel injection systems and reproduces the OEM spray angle, pattern and flow rates to help the engine run smoothly. By atomizing fuel into a fine mist and maintaining consistent pulse response, the unit supports cleaner combustion and more predictable throttle response.

• Optimized nozzle geometry for consistent atomization and even cylinder distribution.
• Precision-wound solenoid for repeatable, computer-controlled fuel pulses.
• Flow characteristics meet or exceed OEM spec for balanced running and economy.

What materials and durability features are included?

GZGN designed this injector with corrosion-resistant internal parts and high-temperature seals to withstand the thermal and chemical stresses of automotive use. Robust construction reduces service frequency and keeps seals intact under engine heat cycles.

• Stainless-steel calibration slide and spring assembly to resist corrosion.
• High-temp O-rings for long-lasting sealing at elevated temperatures.
• Precision-trimmed internals and solenoid windings for sustained electrical performance.

Is installation straightforward and what warranty is provided?

Installation is typically bolt-in when matching OE number and vehicle application; basic mechanical skills and common tools are sufficient for most DIYers. GZGN backs the part with a one-year warranty and recommends checking vehicle fitment tools or the product's fitment list before ordering.

• Check fitment by OE number or vehicle selector before purchase.
• One-year limited warranty with customer support response within 24 hours.
• Replacement procedure follows standard injector removal and reinstallation steps.

Who this is for: The GZGN FJ504 spider fuel injector is aimed at owners and mechanics who need a reliable, affordable OE-equivalent injector for late‑1990s to early‑2000s GM and Isuzu V8 vehicles. It suits fleet technicians, independent repair shops, and DIY enthusiasts restoring engine performance, correcting idle issues, or renewing fuel system components without changing engine tuning.