[Vehicle Fitment]: Compatible with Cadillac Chevrolet GMC Hummer Models, To make sure this part fits your exact vehicle, please enter your model and trim level into the "Amazon Confirmed Fit" [Reference Number]: UF271, 12556893, 12558693, 12570553, 19355500, 3859078, 38590782, D581, 3186, TR5GP, meets OE specification for fit, finish and function [Superior Performance]: Once the ignition coil pack and spark plugs connect with your engine, can be solved difficulty starting, long crank time, misfires, high fuel consumption, engine vibration, check engine light and other problems [Iridium spark plug]: Iridium is a type of refined alloy which is highly suitable to be used as the materials of the central electrode in a spark plug. It extends the life of the spark plug nearly threefold, ensures a more stable idle speed of the engine, and delivers a super performance to the engine with improved fuel efficiency, reduced emissions and faster starting up. [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted ignition coils and spark plugs kit. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind. A-premium Ignition Coil Packs are an ideal choice to replace your broken Ignition Coil Packs. All Ignition Coil Packs meet or exceed OEM specifications. Due to high manufacturing standard, it will come with one year quality guarantee.

Compatible with Cadillac Models:
Escalade 2002-2005 V8 5.3L
Escalade/Escalade EXT 2002-2006 V8 6.0L
Escalade ESV 2003-2006 V8 6.0L

Compatible with Chevrolet Models:
Avalanche 1500 2002-2006 V8 5.3L
Express 1500 2003-2006 V8 5.3L
Express 2500 2003-2005 V8 4.8L/V8 5.3L/V8 6.0L
Express 3500 2003-2004 V8 4.8L/V8 6.0L
Silverado 1500 1999-2001 V8 4.8L/V8 5.3L
Silverado 1500 2003-2006 V8 6.0L
Silverado 1500 Classic 2007 V8 4.8L/V8 5.3L/V8 6.0L
Silverado 1500 HD 2001-2003 V8 6.0L
Silverado 1500 HD Classic/Silverado 2500 HD Classic/Silverado 3500 Classic/Silverado 3500 HD 2007 V8 6.0L
Silverado 2500 1999-2004 V8 5.3L/V8 6.0L
Silverado 2500 HD 2001-2007 V8 6.0L
Silverado 3500 2001-2006 V8 6.0L

Compatible with GMC Models:
Savana 1500 2003-2005 V8 5.3L
Savana 2500 2003-2005 V8 4.8L/V8 5.3L/V8 6.0L
Savana 3500 2003-2005 V8 4.8L/V8 6.0L
Sierra 1500 1999-2006 V8 4.8L/V8 5.3L/V8 6.0L
Sierra 1500 Classic 2007 V8 6.0L
Sierra 1500 HD 2001-2003 V8 6.0L
Sierra 2500 1999-2004 V8 5.3L/V8 6.0L
Sierra 3500 2001-2003 V8 6.0L

Compatible with Hummer Models:
H2 2003-2007 V8 6.0L

OEM Number: UF271, 12556893, 12558693, 12570553, 19355500, 3859078, 38590782, D581, 3186, TR5GP
Quantity Sold: A Set of Eight Pieces
Note: It fits Square Coil only, doesn't fit Round Coil