Spark Plugs and Wires for Chevy 5.3L Silverado Suburban Avalanche Tahoe 4.8L 6.0L, 12621258 Iridium Spark Plugs Compatible with GMC Sierra Yukon 41 110 Item Description ?Excellent Durability? Kernel quenching one-piece integral suppressor seal that helps reduce radio frequency interference meters spark plug energy to help provide long electrode life and seals against compression leakage, Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance ?Compatible Vehicles?41-110 compatible with GM vehicles: For 2007-2014 Chevrolet Avalanche; 2008-2014 Chevrolet Tahoe; 2011-2014 Chevrolet Caprice; 2007-2012 Chevrolet Colorado; 2007-2013 Chevrolet Corvette; 2007-2011 Chevrolet Express 1500; 2007-2011 Chevrolet Express 2500; 2007-2011 Chevrolet Express 3500; 2007-2013 Chevrolet Silverado 1500; 2007-2014 Chevrolet Silverado 2500 HD; 2007-2014 Chevrolet Silverado 3500 HD; 2007-2014 Chevrolet Suburban 1500; 2007-2013 Chevrolet Suburban 2500 ?Long Lasting Time?These iridium spark plugs can provide up to 100000 miles of service before needing a replacement, dual platinum tip for improved resistance to spark erosion fouling and corrosive combustion chamber environment insulator that improves the plug to boot seal platinum center electrode and platinum pad that lower the ignition demand voltage and reduce the possible flame ?LS Spark Plugs Replacements?Spark plug OE: 41-110, 12621258 plug wires OEM number: 9748HH, 88862385. Direct replacement, plug n play, saving time and effort. It will help to improve the gas mileage of your vehicle and deliver excellent performance for a long time ?24 MONTHS GUARANTEE?Exquisite workmanship, strict quality control, and excellent after-sales service, which is why our spark plug wire set is worth your purchase. We provide True and effective 24 months warranty, please buy it without worries ? See more product details Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return 25 days from delivery date but product should be in original condition.