Replaces Part Numbers: Ignition Coils: UF271, D581, 12556893, 12558693, 12570553, 19355500, 19418993, GN10298, 52-1618, 5C1083, C1208, E226; Spark Plugs: 41-962, 19299585; Spark Plug Wires: M8-48322R, 9059, 9748HH, 9748UU, 9748RR, 88862385, 748UU, 12622553, 12656210 Fitment: Compatible with Chevrolet: 2003-2009 C4500 Kodiak 8.1L V8, 2003-2009 C5500 Kodiak 8.1L V8, 2001-2009 C6500 Kodiak 8.1L V8, 2001-2009 C7500 Kodiak 8.1L V8, 2002-2006 Silverado 1500 4.8L V8, 2002-2006 Silverado 1500 5.3L V8, 2003-2006 Silverado 1500 6.0L V8, 2006 Silverado 2500 4.8L V8, 2002-2004 Silverado 2500 6.0L V8, 2003-2007 Silverado 3500 6.0L V8, 2003-2007 Silverado 3500 8.1L V8, 2003-2006 Express 1500 5.3L V8, 2003-2005 Express 2500 4.8L V8, 2003-2005 Express 2500 5.3L V8, 2003-2005 Express 2500 6.0L V8, 2003-2004 Express 3500 6.0L V8, 2002-2006 Tahoe 4.8L V8, 2003-2006 Tahoe 5.3L V8, Fitment: Compatible with Chevrolet: 2002-2006 Avalanche 1500 5.3L V8, 2003-2006 Avalanche 2500 8.1L V8, 2002-2006 Suburban 1500 5.3L V8, 2006 Suburban 1500 6.0L V8, 2003-2006 Suburban 2500 8.1L V8, 2003-2004 SSR 5.3L V8, 2006 Monte Carlo 5.3L V8; Compatible with Workhorse: 2007-2009 R26 8.1L V8, 2006-2009 W16 8.1L V8, 2006-2009 W18 8.1L V8, 2004-2009 W20 8.1L V8, 2007-2009 W21 8.1L V8, 2007-2009 W22 8.1L V8, 2004-2009 W24 8.1L V8, 2005-2009 W25 8.1L V8; Compatible with Cadillac: 2002-2005 Escalade 5.3L V8, 2002-2006 Escalade 6.0L V8; Compatible with Hummer: 2003-2007 H2 6.0L V8 Fitment: Compatible with GMC: 2003-2009 C4500 Topkick 8.1L V8, 2003-2009 C5500 Topkick 8.1L V8, 2003-2009 C6500 Topkick 8.1L V8, 2003-2009 C7500 Topkick 8.1L V8, 2007 Sierra 1500 6.2L V8, 1999-2007 Sierra 1500 4.8L V8, 2002-2007 Sierra 1500 5.3L V8, 2001-2007 Sierra 1500 6.0L V8, 1999-2004 Sierra 2500 6.0L V8, 2001-2006 Sierra 3500 6.0L V8, 2001-2006 Sierra 3500 8.1L V8, 2007 Sierra 1500 Classic 4.8L V8, 2007 Sierra 1500 Classic 5.3L V8, 2007 Sierra 1500 Classic 6.0L V8, 2007 Sierra 3500 Classic 6.0L V8, 2007 Sierra 3500 Classic 8.1L V8, Fitment: Compatible with GMC: 2003-2005 Savana 1500 5.3L V8, 2003-2005 Savana 2500 4.8L V8, 2003-2005 Savana 2500 5.3L V8, 2003-2005 Savana 2500 6.0L V8, 2004-2005 Savana 3500 4.8L V8, 2003-2005 Savana 3500 6.0L V8, 2000-2006 Yukon 4.8L V8, 2003-2006 Yukon 5.3L V8, 2001-2006 Yukon 6.0L V8, 2000-2006 Yukon XL 1500 5.3L V8, 2001-2006 Yukon XL 1500 6.0L V8, 2000-2006 Yukon XL 2500 6.0L V8, 2003-2006 Yukon XL 2500 8.1L V8 Product Size: 8pcs ignition coils+8pcs iridium spark plugs+8pcs distribution wires,and the thread spark plugs diameter is 14mm/0.55inch , length is 17.5mm/0.69inch. Please check the compatibility at the top of the page to make sure that the part number matches your vehicle to ensure that you are getting the correct coils. Note: Please note that it is important to select an ignition coil and spark plug combination that suits the requirements of your vehicle and engine, and it is recommended that you follow the vehicle manufacturer's recommendations or consult a professional technician to ensure that you are shopping for high quality and well-adapted components ---Autodevil UF271 Ignition Coil Pack---
Product Features:
(1) Integrated System: The ignition coil, spark plug, and distribution wire are closely matched to form a complete ignition system, ensuring efficient engine start-up and stable operation.
(2) Efficient Ignition Performance: Integrated design provides fast and reliable spark generation, optimizes combustion, and improves power output and fuel economy.
(3) Durable Materials: All components are made of high-temperature and corrosion-resistant materials, which can withstand extreme driving conditions.
(4) Easy to Install: Designed to meet OEM standards, users can easily install without needing professional tools, saving maintenance time and costs.

Specifications:
Package Includes: 8 x Ignition coils+8 x Iridium spark plugs+8 x Distribution wires
Spark Plugs Size：Thread diameter 14mm/0.55inch, thread length 17.5mm/0.69inch
Spark Plug Material: Iridium

OE Part Numbers:
Ignition Coil: 12556893, 12558693, 12570553, 3859078, 392889925, D581, uf-271, 38590782
Spark Plugs: 41-962, 19299585
Wires: M8-48322R, 9059, 9748hh, 9748uu, 9748rr, 88862385

Fitment:
Compatible With CHEVROLET Models:
for 2002-2006 AVALANCHE 1500 2500
for 2003-2006 EXPRESS 1500 2500 3500
for 2006 MONTE CARLO
for 1999-2007 SILVERADO 1500 2500 3500
for 2003-2004 SONORA
for 2003-2004 SSR
for 2000-2006 SUBURBAN 1500 2500
for 2000-2006 TAHOE
for 2003-2004 TRAILBLAZER
Compatible With GMC Models:
for 2003-2004 ENVOY
for 2003-2005 SAVANA 1500 2500 3500
for 1999-2007 SIERRA 1500 2500 3500
for 2000-2006 YUKON XL 1500 2500
Compatible With Other GM Models:
for 2003-2007 HUMMER H2
for 2001-2007 MERCRUISER All Models
for 2004-2005 WORKHORSE FASTRACK FT1061 FT1261 FT1461 FT16