NPAUTO Square Ignition Coil Pack D581 for Chevy/GMC V8 4.8/5.3/6.0L (2001-2006) — Full 8-Coil Set, Direct-Fit OE Mounting

NPAUTO square ignition coil pack D581 is an 8‑coil aftermarket replacement designed to restore spark performance on 2001–2006 V8 Chevy and GMC 4.8L, 5.3L, and 6.0L engines.

These coil packs are built as a direct-fit aftermarket option to match OE mounting and electrical connections for Silverado, Sierra, Tahoe, Suburban, Avalanche, Express, Yukon, Escalade and compatible GM V8 platforms from model years 2001–2006. Each unit uses reinforced housing materials and internally tested windings to deliver consistent spark delivery and a reliable physical fit. The pack is sold in a complete set of eight coils so you can replace every cylinder’s coil at once for uniform performance.

How will these coils address engine misfire and rough idle?

Failing ignition coils commonly cause intermittent misfires or rough idling because they deliver weak or inconsistent voltage to the spark plugs. Installing a fresh set of coils restores proper spark intensity and timing consistency, which often eliminates misfire codes and smooths idle behavior.

• Replaces worn or cracked OEM coils causing weak spark
• Sold as a full set of 8 for even cylinder performance
• Compatible electrical plug pattern reduces installation errors
• Can clear misfire-related trouble codes when used with good spark plugs

Which vehicles and part numbers does this set fit?

This NPAUTO D581 set fits GM V8 engines 4.8L, 5.3L, and 6.0L on many 2001–2006 models. It replaces a long list of OEM/interchange numbers so you can cross-check compatibility before purchase.

• Common fits: Chevy Silverado 1500/2500/3500, Tahoe, Suburban, Avalanche
• Also fits: GMC Sierra, Yukon, Savana, Cadillac Escalade ESV/EXT
• Interchange numbers: IC400, D581, UF271, 12558693, 12556893, 3859078, and others
• Check vehicle compatibility chart in the listing to confirm fit

What does the package include and how durable are these coils?

The purchase ships with eight individual square ignition coils—one for each cylinder—packaged together for a complete replacement. NPAUTO subjects housings and internal windings to quality checks to help ensure a longer service life under normal operating conditions.

• Includes 8 square ignition coils (complete set for V8)
• Manufactured housings designed for OE-style mounting
• Internal testing on coils to confirm electrical consistency
• Durability improvements over cheap untested replacements

How straightforward is installation and what should I check first?

Installation is typically a direct swap using the factory coil mounting points and electrical connectors. Before installing, inspect spark plugs, ignition harnesses, and mounting studs; replace worn plugs and repair damaged wiring to ensure the new coils deliver expected results.

• Direct-fit connectors and mounting for 2001–2006 GM V8 engines
• Replace spark plugs if they show heavy wear or fouling
• Use a torque wrench to secure coils to manufacturer torque specs
• Clear diagnostic codes and test drive after installation

Who this is for: This NPAUTO coil set is intended for owners and mechanics working on 2001–2006 GM V8 trucks and SUVs (4.8L, 5.3L, 6.0L) who need a full eight‑coil replacement that matches OE fitment and electrical connections. Choose this kit when you want a complete, tested aftermarket set to address misfires, restore consistent ignition performance, and avoid piecemeal coil replacement.