Shop Nilight Ignition Coil Pack UF413 Fit for Chevy Silverado 1500 2500 HD Tahoe Suburban Avalanche Express Corvette Camaro Impala GMC Yukon Cadillac Escalade Pontiac 5.3 6.0L V8 Engine#OE 12611424(8 Pcs) in high quality, support 2 Years Warranty. The silicone rubber boot of Nilight ignition coils packs contains silicone oil to make it easier for you to replace and install.