Ignition Coil and Iridium Spark Plugs for Chevrolet Blazer (2019-2020) 3.6L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2019-2020 Chevrolet Blazer

Primary Function: Restores complete combustion efficiency and eliminates secondary ignition breakdown across all six cylinders on direct-injected 3.6L V6 platforms.

The Stock Blazer High-Voltage Breakdown

The 3.6L LGX V6 operates under elevated cylinder pressures and thermal loads within the engine bay. Over time, OEM coil windings degrade from cyclic heat soak, leading to internal dielectric insulation failure, high-rpm misfires, and spark blowout. Concurrently, factory spark plugs suffer electrode erosion, widening the plug gap and forcing the ignition coils to draw excessive primary current, which triggers hesitation and diagnostic trouble codes under load.

The Engineering Solution

This direct-fit ignition service kit provides six coil-on-plug assemblies manufactured with high-conductivity internal copper windings and heavy-duty thermoplastic housings to resist dielectric breakdown. Paired with six fine-wire iridium spark plugs, the assembly delivers a focused spark kernel requiring lower ionization voltage. This combination maintains consistent flame-front propagation, smooths idle harmonics, and prevents unburnt fuel fouling under aggressive throttle input.

Technical Specifications

Compatibility

• 2019 Chevrolet Blazer (3.6L V6 - RS, Premier, Cloth, Leather)
• 2020 Chevrolet Blazer (3.6L V6 - RS, Premier, 2LT, 3LT)

The Chevrolet Reliability Standard

Engineered to meet rigorous crossover utility demands, this complete ignition refresh preserves cold-weather starting reliability, stabilizes towing power delivery, and protects catalytic converters from raw hydrocarbon contamination.