Pack of 6 Ignition Coil for Buick Chevrolet Envoy Hummer 9-7X 4.2L Compatible with UF-497 C1558 DIRECT REPLACEMENT/ UPGRADE over your original stock coils. We only use the highest grade materials. This makes our product durable and reliable under extreme conditions while providing High Electrical Resistance, strong Spark from plugs, and being resistant to Corrosion and Abrasion IGNITION COIL PACK for, 3.7L 4.2L, Trailblazer 2006 to 2009, Envoy 2006 to 2009, Ascender 2006 to 2008, 9-7x 2006 to 2008, Rainier 2006 to 2007, Colorado 2007, Trailblazer EXT 2006, Envoy XL 2006 CHEVROLET, GMC, ISUZU, SAAB, BUICK owners please check fitment bar and description before you BUY IT as the ignition coil pack can change based on the year/ month of manufacture of your vehicle Compatible with UF-497 C1558 One Year Warranty 2006, 2007 BUICK RAINIER L6 4.2L 2006, 2007, 2008, 2009 CHEVROLET TRAILBLAZER L6 4.2L 2006, 2007, 2008, 2009 GMC ENVOY L6 4.2L 2006, 2007, 2008 ISUZU ASCENDER L6 4.2L 2006, 2007, 2008 SAAB 9-7X L6 4.2L Eliminate misfire Direct replacement into vehicle Durable as they come Easy Installation Custom-made for the road Fit OE equipment with ease Tested in real life situations Most coils comepre-greased