General description The Auto Parts Ignition Coil is designed for various GMC, Chevrolet, and Hummer models, ensuring optimal performance and reliability. This ignition coil is a crucial component for the ignition system, providing the necessary voltage to ignite the fuel-air mixture in the engine. Technical specifications Type: Ignition Coil Part Numbers: 12596547, 12612369, 12619472, 12629472, 126294721, 8125965470, 12496547 Color: Black Material: Plastic Measurement allowed error: +/- 1-3 cm Compatibility and accessories Suitable for GMC Canyon, Envoy, Hummer H3, Chevrolet Colorado, Trailblazer Compatible Engine Types: L6-4.2L (2006-2007), L4-2.9L (2007-2012), L5-3.7L (2007-2012) Models: Trailblazer (2006-2009), Trailblazer EXT (2006), Envoy (2006-2009), Envoy XL (2006), H3 (2007-2010), H3T (2009-2010), Ascender (2008-2009), 9-7X (2006-2008) Installation Installation of the ignition coil should be performed by a qualified technician to ensure proper functioning and compatibility