Ignition Coil and Iridium Spark Plugs for Oldsmobile Bravada (2002-2004) 4.2L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2002-2004 Oldsmobile Bravada

What it Does: Restores factory secondary ignition output, stabilizes idle, and eliminates cylinder misfires across the inline-six Atlas engine platform.

The Stock Bravada Ignition Coil Degradation

The factory coil-on-plug setup on the 4.2L Atlas LL8 engine is vulnerable to thermal cycling and moisture intrusion down the deep spark plug wells. Over time, OEM primary and secondary winding insulation breaks down due to prolonged underhood heat soak, causing dielectric puncture and voltage bleed. Combined with standard copper plug gap erosion, this degradation leads to unburned hydrocarbon accumulation, random P0300-P0306 misfire trouble codes, rough idling, and catalytic converter stress under heavy load.

The Engineering Solution

This complete 6-cylinder ignition overhaul kit pairs high-grade coil assemblies with fine-wire iridium spark plugs. The replacement coils feature high-conductivity internal copper windings, durable thermoplastic housings, and corrosion-resistant blade terminals engineered to maintain high kilovolt discharge without arching. The paired iridium plugs offer superior thermal stability and electrical conductivity, sustaining precise spark gaps significantly longer than conventional plugs to ensure complete flame-front propagation and dependable cold starting.

Technical Specifications

Compatibility

• 2002 Oldsmobile Bravada Base 4.2L L6 Gas (GMT360)
• 2003 Oldsmobile Bravada Base 4.2L L6 Gas (GMT360)
• 2004 Oldsmobile Bravada Base 4.2L L6 Gas (GMT360)

The Oldsmobile Reliability Standard

Engineered to handle the demands of everyday utility, all-wheel-drive torque loading, and extended towing, these ignition components provide heavy-duty insulation and consistent spark energy delivery to keep your GMT360 running reliably in all operating conditions.