6 Ignition Coils & 6 Iridium Spark Plugs UF497 5019 for Chevy Buick | Fits 4.2L: Rainier(06-07),Trailblazer(06-09),Envoy(06-09),Ascender(06-07),9-7x(06-09). OE:12596547.Better MPG,Long-lasting

GUARANTEED FITMENT IGNITION COIL & SPARK PLUG KIT This complete set includes 6 heavy-duty ignition coils and 6 pre-gapped iridium spark plugs, engineered for 4.2L L6 engines (20062009). for Buick Rainier (20062007); for Chevrolet Trailblazer/Trailblazer EXT (20062009); for GMC Envoy/Envoy XL (20062009); for Isuzu Ascender (20062007); for Saab 9-7x (20062009). Always verify fitment using the compatibility chart. Each ignition coil is marked with cylinder numbers for installation.; OEM-EXACT REPLACEMENT FOR 4.2L L6 ENGINES Our ignition coils cross-reference to UF497, UF-497, 12596547, 12612369, 610-02868, 8125965470, C741, 12629472, 8126123690, 8126294720, and GN10454; iridium spark plugs replace 5019, LTR5GP, AP5364, and NGK/Denso equivalents.

Built strictly to factory dwell time, heat range, and connector specsno check-engine lights, no reflash needed.; WHY REPLACE YOUR IGNITION COILS & PLUGS TOGETHER On 4.2L L6 engines, under-hood heat often exceeds 300°F, degrading ignition coils and widening plug gaps over time. Replacing both together restores the entire ignition patheliminating misfire codes (P0300P0306), rough idle, hesitation, and cold-start stumbles. It's a complete cure, not a band-aid.; INSTANT PERFORMANCE GAINS & BETTER FUEL ECONOMY Upgrade your drive with reliable ignition coils that maintain stable voltage under high loads.

Built with high heat-resistant materials to withstand extreme under-hood stress, our coil packs deliver quicker ignition and i