FAERSI Ignition Coil Pack for GM V8s — Direct-Fit UF271/D581 Replacement, Improved Durability

FAERSI ignition coil pack replacement restores reliable spark to compatible GM V8 engines, replacing UF271/D581-style coils for Chevrolet, GMC, Cadillac and related models.

When an ignition coil begins to fail it can cause rough idling, misfires, reduced fuel economy, and a check engine light. This FAERSI coil pack is built as a direct-fit replacement for many GM and Isuzu applications—offering the same mounting points and electrical connections as original equipment while using upgraded materials for durability. It ships as a complete coil pack assembly designed to swap in quickly and return the ignition system to consistent high-voltage output.

Which vehicles and OEM numbers does this coil pack fit?

This coil pack is compatible with a wide range of General Motors and related vehicles that use the UF271/D581 family of coils. Always compare the physical connector and mounting arrangement on your original coil before purchasing to confirm fitment.

• Common vehicle fits: Chevy Silverado (1500/2500/3500), Avalanche, Suburban, Tahoe, Express 3500
• GMC models: Sierra (1500/2500/3500), Savana, Yukon XL
• Cadillac & others: Escalade, plus select Hummer H2 and Isuzu NPR applications
• OEM cross-references: UF271, D581, 12558693, 12556893, 12570553, 5C1083, 3859078 and related numbers

How does this coil pack improve ignition performance?

FAERSI coil packs are manufactured to meet or exceed the electrical output of typical OE coils, providing stronger, more consistent spark energy. That helps reduce cylinder misfires and supports smoother acceleration when the ignition system is functioning properly.

• High-quality copper windings and improved insulation for steady high-voltage delivery
• Reduced electrical leakage and better resistance to heat-related degradation
• Designed to help resolve misfire, hesitation, and irregular idling caused by failing coils

What should I expect during installation and maintenance?

Installation is intended to be straightforward for a technician or experienced DIYer; the unit is a direct replacement using the factory mounting and electrical hookup. Replacing all coils at once is recommended when one has failed since others of similar age are likely to be degrading as well.

• Direct-fit design for same bolt pattern and connector layout as OE
• No special programming required—plug-and-play in most applications
• Inspect spark plugs and wiring when changing coils to ensure optimum system reliability

What warranty and build quality can I rely on?

FAERSI emphasizes component quality and backs this coil pack with a one-year unlimited-mileage guarantee. Materials and manufacturing focus on corrosion resistance, abrasion protection, and stable electrical resistance under heat and vibration.

• Construction uses high-grade materials for longer service life
• Resistant coatings to limit corrosion and wear in engine-bay environments
• One-year unlimited-mileage warranty from FAERSI for added confidence

Who is this for: This FAERSI ignition coil pack is aimed at owners and mechanics working on GM and related V8 vehicles that cross-reference UF271/D581-style coils who want a dependable, direct-replacement unit. It suits fleet maintainers, DIY enthusiasts, and professional shops needing a robust spare or repair part to restore proper ignition function without modifying the vehicle’s wiring or control systems.