Ignition Coil and Iridium Spark Plugs for GMC Acadia (2017-2021) 2.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2017-2021 GMC Acadia

What it Does: Restores complete combustion efficiency and eliminates under-load cylinder misfires on the 2.5L Ecotec engine by delivering consistent secondary voltage and precise spark timing.

The Stock Acadia Ignition Breakdown

Under repeated thermal cycling, the factory coil-on-plug packs on the Acadia's naturally aspirated 2.5L engine experience dielectric breakdown within the internal epoxy potting. This degradation leads to high-voltage leakage, erratic spark discharge, and internal resistance spikes in the copper windings. Paired with eroded factory plug electrodes, this degradation causes rough cold starts, hesitation under throttle load, reduced fuel economy, and active P0300 through P0304 trouble codes.

The Engineering Solution

This direct-replacement ignition service pack utilizes heavy-duty primary and secondary copper windings insulated with high-grade thermal epoxy to prevent internal flashover and voltage loss. The matched iridium spark plugs feature ultra-fine center electrodes that require lower strike voltages while resisting carbon fouling and high combustion temperatures. High-tensile silicone boots shield against moisture intrusion and block spark arcing to the cylinder head.

Technical Specifications

Compatibility

• 2017 GMC Acadia (SL, SLE) 2.5L L4 Gas
• 2018 GMC Acadia (SL, SLE) 2.5L L4 Gas
• 2019 GMC Acadia (SL, SLE) 2.5L L4 Gas
• 2020 GMC Acadia (SL, SLE) 2.5L L4 Gas
• 2021 GMC Acadia (SL, SLE) 2.5L L4 Gas

The GMC Reliability Standard

Engineered to exact OEM interface dimensions, this ignition system restores factory throttle response, smooth idle stability, and dependable cold-weather starting without triggering check engine lights or requiring PCM re-calibration.