[Vehicle Fitment]: Compatible with GMC Canyon 2007-2012 L4 2.9L; Compatible with Chevrolet Colorado 2007-2012 L4 2.9L. [Reference Number]: The A-Premium Ignition Coil Pack's reference number: UF497, 12596547, 12496574, 12612369, 12629472, H6T15271ZC, 8125965470, 5019, LTR5GP. Before placing an order, verify that the part is compatible with your vehicle using the compatibility system.. [Iridium spark plug]: Iridium is a type of refined alloy which is highly suitable to be used as the materials of the central electrode in a spark plug. It extends the life of the spark plug nearly threefold, ensures a more stable idle speed of the engine, and delivers a super performance to the engine with improved fuel efficiency, reduced emissions and faster starting up..
