[OE]:Spark Plugs Replace Part Number: 41-962, 19299585,APP5243,3784,PT16TT,PTR5D-10 Spark Plugs Wires Replace Part Number: 88892831,748EE Ignition Coil Replace Part Number: 12558693, 12570553, 3859078, 38590782, 90541062 [Compatible With]:2003-2006 Avalanche 1500, 2003-2005 Savana 1500, 2003-2005 Savana 2500, 2003-2005 Savana 3500, 1999-2006 Sierra 1500, 2001 2003 2005 Sierra 1500 HD, 1999-2004 Sierra 2500, 2001-2005 Sierra 2500 HD, 2002 Sierra 3500, 2003-2006 H2 [Package Inludes]: Package Inludes: 8x Spark Plugs, 8x Spark Plug Wires, 8x Ignition Coil [High Quality]: Crafted from premium insulating materials, while offering excellent corrosion resistance for a long service life [Professional After-sales Service]:If you have any questions, please feel free to contact us, and we will patiently explain everything until you fully understand This set includes 8 spark plugs, 8 spark plug wires, and 8 ignition coils. Replacement part numbers: Spark plugs: 41-962, 19299585, APP5243, 3784, PT16TT, PTR5D-10 Spark plug wires: 88892831, 748EE Ignition coils: 12558693, 12570553, 3859078, 38590782, 90541062 Compatible with: 2003-2006 Avalanche 1500, 2003-2005 Savana 1500/2500/3500, 1999-2006 Sierra 1500, 2001/2003/2005 Sierra 1500 HD, 1999-2004 Sierra 2500, 2001-2005 Sierra 2500 HD, 2002 Sierra 3500, 2003-2006 H2. Made of high-quality insulating materials with great corrosion resistance for long service life. Professional after-sales service is provided; please contact us if you have any questions.